Oliver Heaviside is the most underrated scientist ever. In school they teach us about Galvano, Ampere, Tesla and so on, but never Heaviside. Oliver Heaviside was an autodidact (self-taught) mathematician and physicist. He coined all the terms used in AC circuit analysis, he invented vector calculus and his work changed telecommunications. Fun fact: since he wasnt formally educated, he was in conflict with the scientific establishment his whole life
@@stuckonearth4967 It's not just Heavyside. Elon Musk naming his company Tesla may be the only reason we know that name. The masters tried to sweep him under the rug and discredit him too. The crime is not being self taught it's anything that redistributes power or wealth from the masters. This goes back to ancient times and the story of Prometheus who stole fire from the Gods in 500 BC. Zeues crucified him to rock and had an eagle eat out his liver, which would regenerate so Prometheus could be tortured again the next day at infinitum. The moral of the story is when you discover something and don't bring the current powers that be with you unveil it the power you unleash may become so imbalanced that it lashes out against you. So unfortunately advancements will probably have to include big oil and the most polluting companies or they may react so sharply against that new scientist, that he will join Heavyside, Tesla, and Prometheus.
but... surely there is a better way than one made up 200 years ago....? We've improved it's efficiency, but you'd think with everything we've learned in 200 years we'd have come up with something new?
Signature Edits I’m not sure the there is any way around the copper coils and magnets but the method in which we turn these generator turbines is insane. Our first idea has been one of the best. Use falling water. But then the next 2 are out there. 1.) Let’s dig up Old dinosaurs and plants from millions of years ago, light it on fire and boil a big pot of water to create steam. The steam will turn the turbine. 2) If we can split a uranium atom we can release a lot of heat to boil a big pot of water. The steam will turn the turbine. So let me get this straight you split the atom to boil a pot of water. Way to go
@@ronbrennick7351 Yes sir. Sorry Ron. Didn't mean to offend. You give great advice which I will follow starting . . . now. See you at the gay bar tomorrow.
Gaybar what, your dad is at that bar with your uncle and cousins if you meet me there you'll be going to a family reunion and your uncle father will be there too.
Your videos should be mandatory in school as an introduction to a new subject, they usually make it SO much easier to understand a course. Many teachers know the subject, but they can't teach it. Your videos are usually "reference level" in both cases...
I think the important thing that people often miss is that when current in drawn from the voltage source (so power), a torque is created so that it impedes the rotation. So we don't only have to make spin the rotor "once" to give it momentum, but apply a constant power at least as much as the drawn electric power.
I don't think anyone misses that. If you could spin a rotor with one push and it ran forever and ever having a perpetual motion machine there would be no issues regarding power or the climate. Perpetual motion machines aren't even really pursued anymore except as UA-cam click bait. All the solutions for clean renewable energy have been invented. Will we have the resolve to implement them or will we go down in history as the monsters that set in motion the destruction of all life on Earth. Knowing full well it was happening and how to stop it, but did nothing.
@@anthonypape6862 Your'e in the good side but trust me, almost 99% non tech would imagine that it might be possible to retrieve more energy (and especially because they don't really feel what "torque" is but only speed). I have a vid with exactly this point explained, it has +2M views, and it's not sufficient to convince everyone!
@@ScienceAsylum how is the valence of the conductive metal refilled after electricity flows though it? i realize it they are lost and contributed one to another in a flow of electrons down a wire but somethings has to refill the valence shell electron in the original atoms that was lost. Anyone know??
@@Acuraintegraman1 It doesn't _need_ to be refilled because it's a closed circuit. Imagine a closed pipe system where water never leaves. Do you need to refill it with water?
This has to be in the top 5 channels on youtube. Incredible explanations and hysterical commentary. I think I've laughed to tears at least three times watching this channel.
I jumped on this as fast as I could and you already had 230 views and 38 likes. Keep this up dude, you not only matter so much to me as someone that was screwed out of a proper formal education in the sciences, but I pass this stuff to my (at the moment:) 9yo nephew and use it to explain things ostensibly "beyond" his ken. You're making a huge fucking difference, man, keep going, even though it won't be immediately visible. You're not just making my 30yo ass smarter, but I use your material to encourage kids I know. KEEP THIS UP, and I'll be supporting you via patreon in a few weeks (sorry, I'm poor :C)
6:20 We don't always turn coils. Usually the coils are fixed to the stator and the rotor has DC excitation to cause the change in magnetic flux but the same thing really
3:30 It's also worth to mention that when there is something connected drawing current from the generator, it gets harder to spin (I guess you'll cover Lenz's Law in a future video). That's why infinity energy generators don't work. When there's no current flowing, all the force you apply is turn into motion, and since nothing is consuming energy, the coil would continue to rotate indefinitely, if there was no losses due to friction and drag. However when something is connected, creating an electrical circuit, part of the kinectic energy of the coil is turned into electrical energy. Thus if the torque applied is constant, the angular speed of the coil will reduce, or conversely, to make the speed constant, a higher torque is needed.
This a good point and something that might be worth doing a solo video on. I remember we did experiments like this in physics class. Let a pendulum swing through a magnetic field and it swings normally. Replace the head of the pendulum with something conductive like copper and the pendulum swinging stops really quickly, the breaking action is really evident. What's going on is that the magnetic field induces a current within the copper, little electrical loops. Because this takes energy, the energy has to come from the motion of the pendulum. Hence the pendulum stops moving very quickly because those current loops are actually using up a lot of energy. The point of the lesson was the same as yours: perpetual motion energy-making machines don't work. That energy really has to come from somewhere, and there ain't no free lunch.
@urmthrwan Yes, in theory it would be possible if you also eliminate the mechanical losses (friction and drag). It makes sense considering that the power is given by the product of the voltage across a device by the current passing through it: P = V x I. Usually, the power is zero if there's no load, meaning there's no current regardless of the voltage generated. In this setup though, there would be no power dissipated because there would be no voltage drop between the ends of the coil, regardless of the current passing through it, so the power equation becomes zero too. I don't see any practical application of this kind of generator though.
Question not about electricity but black holes: An old video mentions that there is infinite time dilation at the event horizon; a distant observer would never see a falling clone cross the event horizon. So how to black holes feed or merge, and how can we see evidence of it, if the time dilation for objects falling into a black hole is so severe that it never "happens" for us?
For a distant observer, it doesn't actually matter if stuff crosses the horizon. If it's close, it's still adding to the mass located in that general area.
Pushing a wire side ways in a magnectic field should cause current, brilliant and very clearly explained. Now I know exactly how the relationship between current and magnetism works, great video...
Thank you, this is what I wanted to know! I kept trying to look up how rotational energy is actually converted into electrical energy, but all the results and other UA-cam videos just kept skipping over the electromagnetism part! Y'know, the part that actually converts the mechanical energy to electric energy. This is such a fantastic video!
I wish I had discovered this channel years ago! Absolutely profound insight along with an impactful delivery that makes us viewers engaged! WELL DONE SIR!
Have to be honest, first time watching one of your videos I felt like they was meant to be just for kids, but now I really enjoy each one of them. They are explained so well, in such details without all that misleadings examples that are used to supposedly help us understand. I hope you keep doing it for a long time and I expect to be one of your patreons soon. I think I may help you with spanish subtitles so I could recommend this channel to more people. Thanks for your work!
Usually it's the magnet that spins, and not the coils. It's easier to extract power from stationary coils. The magnetic field can be created by a spinning coil, but it operates at a lower voltage which can be passed into the rotor by slip rings or a transformer
@@ScienceAsylum so i guess that means that the direction of the magnetic field on that axis doesnt matter for the Lorentz Force? both the conventional current and electron flow in that wire create Lorentz Force in the same direction? (of course it needs to be perpendicular, but already is as seen in video)
“ To the time line!!” ;) Another rather rather g o o d piece of edutainment. It’s the balance of competence and humor that we , your fan community are unable to resist.
Why isn't the wire on the left at 1:20 also shown as generating a magnetic field? And why does the wire on the left move away, instead of the wire on the right move away -- or both move away from each other? Not explained. Very confusing.
1) You are correct. If the wire on the left has a current, then it also affects the magnetic field. I didn't include that because it would have distracted from the point I was making with the graphic. At some point, in any diagram, you have to leave things out for clarity. 2) As far as the wires moving, assume the wire on the right is attached/fixed to the table. Problem solved.
Hey I have a question, if charge moving inside a magnetic field experiences Lorentz force due to it's motion, so can we conclude that Lorentz force is the cause of electromagnetic induction? Because while moving a wire inside a magnetic field we are providing some velocity to the electrons inside the wire due to which they experience Lorentz force and since this force is applied on electrons, we can say that this is some kind of electrostatic force so we have a electric field inside the wire and hence an electric potential. So can we say that Lorentz force is the cause of electromagnetic induction?
Yes, definitely. That's the way I would explain it, at least conceptually. Mathematically, that's not very convenient, which is why we have Faraday's law instead.
@@ScienceAsylum Exactly! But by Faraday's Law, we can see the effect of electromagnetic induction. I mean we can use the equation to get the potential generated in a coil but Faraday's Law does not provide any reason for this phenomenon. Maybe because all Faraday did was conducted experiments and provided a mathematical equation to satisfy his results.. And maybe he never bothered to find out the cause of any phenomenon he observations..🤔 Oh and by the way thanks for replying to my comment🙂
I have some questions. 1. How is the interaction between the electric current that is flowing through the copper wire and the metal filings? My assumed answer is that the metal filings are being magnetized and so they are drawn to the copper wire, but I am not sure. 2. When a magnet is spun around a copper wire coil, is the wire producing electricity because the electrons from the wire are being stripped? Where exactly is the electrons coming from? The air? Or the copper wire itself? 3. As a magnet is spun inside a copper coil, is the coil then electrified? Then is that how we transfer the electricity to some kind of conductor that will then send that power to our homes? Want to know more about how the generators are functioned. 4. Last question for now, if electricity is simply electrons that are stripped from negatively charged atoms, then what is the nature of electrons? Is their nature just to flow and transfer that energy until it can settle somewhere? One more question, if magnets repel each other if we face the two like poles, could we not use that repulsion force to spin the generators in powerplants instead of using external power sources like coal, steam water and air? If we could use thatrepulsive energy, we could then have it recharge the magnets so that it can be strengthened so that the energy does not decay over time and use the excess energy to power our appliances. Just thinking of future ways we could not have to rely on external power.
1. Yes, the iron filings become magnetized and align themselves to the field created by the current. I talk more about magnets here: ua-cam.com/video/XczMRsiq9mk/v-deo.html 2 & 3 & 4. No, the wires remain electrically neutral the entire time. We're not gaining or losing electrons. We're just moving them around. That's why a closed circuit is necessary for current to flow. Any electron that leaves a wire must be replaced. I talk about electricity flow here: ua-cam.com/video/QKxep82_9b8/v-deo.html
We always have to rely on external energy. As a generator transforms energy, that energy leaves and must be replaced. The same goes for magnets. As you use "permanent" magnets, they demagnetize.
That's what Steampunk is all about. It's an alternate history fiction that explores what our modern world would look like, if electricity were never discovered.
Sir,you please explain the mechanism of producing electric current from magnetic field with a diagram. I have read many a times this,but still I cannot understand.
I have to add to the beginning of this comment, all credit to Nick, he did mention the wire was insulated..... I know this is a really basic point to make, but I've noticed in the past when someone who is attempting their very first coil, they don't realise that the copper wire here is actually insulated and then, don't understand why their coil doesn't work because they've stripped down to a bare copper wire to start their coil. Science Asylums copper wire has a thin clear lacquer coating to prevent the wire from touching itself.
The microphone you talk into converts a metal plate's motion into electricity. A magnet provides the field and a coil collects the current. Vibrations from your voice make the mic's plate vibrate, same in guitar pickups where the strings replace the plate. Scream close to a guitar string, and the amp will actually project your voice.
Voltage is actually the potential for charges like electrons in the electric field. A potential is always the difference of energy of the particle at a point compared to the energy at a reference point diveded by the charge itself. So if you multiply the voltage (or the potential) at a point by a charge you get its energy at this point. Or in other words the higher the voltage, the higher is the energy of charge at that voltage.
By energy i mean the potential energy und note that you dont always divide by the charge. For example there is also a potential for the gravitational field which is the difference of potential energy divided by the mass. So in general the potential of a force field in physics is the potential energy divided by the quantity which causes the force. The cause of the force in the electric field is the charge.
If I am not mistaken, in hydro power plants and probably in other generators too, the coils are static. It's electromagnets that rotate alternating south and north along the coils that go around the rotor.
The changing direction of current means that the electrons don't move very much. What's moving is the energy they carry. You can think of it as a wave. If you have a wave pulse travelling a rope for example, the rope itself doesn't move forward (only up and down), what does move forward is the energy pulse.
AC _doesn't_ flow from one point to another. The charge never goes anywhere.... but it doesn't have to. You just have to get the _energy_ to go places. Whether the charge goes places or not is irrelevant.
Technically it will also depend on the kind of load it's connected to the AC power supply, some loads, called reactive loads, don't use the electric energy generated, they basically store the energy and then give it back to the generator, so in the case of an ideal reactive load, there would be no energy transfer. Using the wave analogy, it would be like a stationary wave or an harmonic oscillator.
In calculus I always heard about the "Heaviside step function" and I honestly thought it was "heavy-side" like heavy vs light and had something to do with taking the value of 1 rather than 0 at 0 until I quite recently (but not today) learned there was a physicist named "Heaviside" who invented electromagnetism and vector calculus.
Taylor Polynomials is another interesting coincidence where the mathematician's name describes the concept he contributed to mathematics. A Taylor polynomial is tailored to match the function.
Hi SA. 50 years ago there was a toy or pond with water, size was about 10 inches across and 1 inch deep. Floating on the top was 5 or 6 plastic ducks each having a small 1/2 inch battery. The magnetic forces moved the ducks around the pond and did so for hours. That is the concept or problem,, can the magnetic force trigger electro magnetic inducer to capture energy but on a larger scale.?
Thank you, your video explained it really well, i love how you made it clear that magnetic induction/spinning coils around is the actual source of energy. I was really confused trying to understand how Nuclear Powerplants work
The original source of our energy is the Sun. All we do is convert energy to a more convenient type. We have never made or destroyed energy. It just is, and it's free in the raw state as when Sun bathing. All conversion is costly and has inefficiencies. Sun to electricity by photovoltaic panels, wind to mechanical, to generation, fuel to mechanical to generation.
Hello! In the experiment that you showed later on in this video (5:10) When you connect the coil to the battery, doesn't it become a solenoid? And so, why doesn't it get attracted to the magnet when it is spun, causing it to stop spinning.
2 Questions: 1) Does it matter if the magnet is moving vs the coil or must the coil be moving? 2) If I have a coil of copper wire of lets say 400 turns and that coil has inside diameter of 1". Is it better to have a magnet go through the inside of the loop or better to have magnets pass by the outside of the loop, perpendicular to it?
All motion is relative, so which thing is moving makes no difference. All that is required is that they're moving _relative_ to each other. The same effect will happen either way. (There is a difference in engineering a device though. Magnets tend to be a lot heavier than coils, so it takes more force to move them. It's easier to make coils move.)
@@ScienceAsylum What about the magnetic flux. Must the magnet pass through the opening of a coil or can you have a magnet on each side of the coil. For example 1" square magnet, whose north pole is facing the ceiling goes through a coil of wire much like being dropped through a cup with no bottom as option 1. Option 2 is 2 magnets separated by the width of the coil (still in position like the cup with no bottom on the table, each magnet now has it's north pole facing the south wall in your home. These two magnets swipe by the coil from the ceiling to the floor. The flux going through the coil perpendicular to the winding's. Is one option better for induction?
I just hope UA-cam recommends your videos like it does for other physic channels as I believe you should have over a million subscribers already. Thanks for the videos nevertheless. You are awesome
This video presents the concept of induction as self explanatory and circular. Why? Because it's moving! Here's some equations! I suspect the video creator doesn't even think about such questions because they merely parrot others. The blurb at the end on "good sources of energy" is pure propaganda.
@@krishabm1... I think you have to run a magnet through a coil. I don't think it works with bread you want to toast. I am hungry, I will try it and I'll let you know if using my toaster reduces my electricity bill.
The Science Asylum well Newton didn’t have good people skills either. I wonder how much luck it takes and how much marketing for your ideas to be appreciated by the community.
For those who might have trouble visualizing it, the best analogy for voltage and current(amperes) i have heard is a waterfall. The height of the waterfall is the voltage (the potential) The amount of water falling is the amperes. Even if the waterfall is 200 feet tall, if a single drop falls theres not a lot of power there but it has potential if a river were to fall from 200 feet. And the total amount of work that can be generated from such waterfall would be measured in watts(in electrical terms) Height × flow = work(power) V×I= W
So, if you connected a wire to each end of that spinning copper coil would you produce electricity? I’m looking for a video that shows the simplest way to create electricity with a coil and a magnet.
Hi, I asked this before, but perhaps it eluded you. One more shot. Can you PLEASE explain the apparent chirality of the magnetic field? Charged particles will move in one way out of two possible ways when travelling through a magnetic field (opposite charges create opposite motions). And, conversely, charged particles will create a magnetic field in one of two possible directions (opposite charges create a magnetic field in opposite directions). You have this indicated in your videos. It seems completely arbitrary without a cause; it likely doesn't have a 'cause', but probably the answer is just 'because'. Not even /r/askscience was able to answer this. Really hoping to get an explanation. Thanks!
The magnetic _field_ is made up by humans. It could have easily been decided to define it the other direction. The magnetic _force_ is a different story. The force represents an effect we can directly observe, so it's not made up by us. In reality though, there is only one way the force can go: the way it _actually_ goes. We make the math match the universe, not the other way around.
@@ScienceAsylum Thank you for replying! So, in the end the motion caused by a magnetic field always happens in direction A, and never in direction B "just because". Have physicists not wondered about why that is?
@@Hier00 physicists always wondered about this. The best we can do is try to find the least rules/assumptions which still produce matching reaults with reality. Probably we will never find an explannation for reality purely on theoretical grounds, since there are many seemingly possible but different laws which could exist. In classical electromagnetism the best you can do is declare a lagrangian for the electromagnetic field, and one for interactions between fields and particles. These are both expressions 4-5 caharacters long, and reproduce classical electromagnetism.
@@zoltankurti Thank you for the reply. This observation just seemed a little arbitrary to me, considering the spatial dimensions. Ultimately, I just wish that teachers would have made a distinction between a phenomenon whose explanation is very complicated and would be studied in later years, and a phenomenon that has reached a wall in science.
What if you spin the magnet around a coil? Would it need to spin around the coil at a perpendicular angle to make it give a voltage? Or what it you spun the magnet around the outside of loop on the same plane?
Wonderful explanation! This channel is the Oliver Heaviside of UA-cam. On a positive note, the improved YT algorithm has actually provided me with something useful.
Where are we getting all these magnets from? Are they constructed or found? And if constructed, how much energy do they require to make? I magnetized a screwdriver once, by wrapping a coil around it and giving it 24V for 30 sec or so and half a year later it is still magnetic.
one crazy question nick ! imagine if we isolate a black hole ....and start "feeding" ELECTRON ONLY. what will happen if we continue to feed..also consider that black hole also SPIN. will it produce magnetic field also?
I believe it should be plausible. However, getting a black hole charged to the extent that it produces a magnetic field great enough to be used from the distances we can reach would require an immense quantity of charged particles to be sent within it. Nonetheless, as had been said above, they already do have a significant magnetic field.
Yep. By the way i forgot to add my answer. If you threw electrons into a accretion (sorry if spellings arent correct) disk, then those electrons will produce a strong magnetic field. But for a blackhole to have a magnetic field, it must have a charge.schwarzschild bhs and uncharged kerr blackholes wouldnt do that.
A repeat my answer, given to someone below here too for others maybe wondering/thinking about the first section of the video. A changing magnetic flux induces voltage first (EMF) and if the circuit is closed (electrons can move continuously) then current will flow: charge will move due to voltage difference - an induced electric field which actually a "curled E" as opposed to a "static E" usually created by non moving "q" (charge). In the video and in the wires in field part this is not explained. There it says: changing magnetic field induces current or moving the wire in the magnetic field (which also means changing magnetic field/flux), which is "indirectly" true, but really that part assumes, that the circuits formed by each wire are closed. So the induced EMF/voltage will immediately cause the current to flow in the second (here moving) wire too. In the first wire, it also has to be some EMF/voltage source causing the current in a closed circuit. The video and the explanation are still correct as: - it focuses on just the wire sections or infinitely long theoretical set - leaves some part of the process for the "student" to think about as later induced voltage is explained, so the "student" could make the connection him/herself.
Question: You say power plants use kinetic energy to spin coils inside magnetic fields, but could you do it the other way, could you spin a magnet inside a stationary coil? Would that generate power aswell?
Yes, you can absolutely do it either way. It doesn't matter which is spinning. However, there are practical problem to spinning something as heavy as a magnet.
2:15 if green arrow is velocity, and if B points out of screen, v x B points up. But if q is negative (from electrons) , qvxB points the opposite of up, i.e., down.
So would moving a motor with magnets and no electricity be theoretically possible because magnets always put out force and with eventually run out of magnetism, so again theoretically wouldn’t there be so way to arrange fields with a big enough magnet or something? I know perpetual machines aren’t real
Just wanted to throw some inconsistent encouragement your way. I'm not a scientist, or use what you teach in any way. I'm a meditation teacher. But as a teacher I recognize that you do more than just entertain us or help students pass tests. You are following a passion, discussing the nature of the universe. And despite the fact that it may not bring you wealth or much utility, it adds something important to the question of what it means to be human. You inspire, guide, and provide a positive example of humanness. You've touched hundreds of thousands of minds if not millions. You done good kid. :-) Keep it up. Much Love!
How much torque & how many coils on a loops do I need to produce about 15kw of electricity for an example? How do i regulate the rpm's (frequency)? In other words I need more clarity on the relationship between torque, number of coils on a loop & frequency (Hz). A video on this would very much be appreciated. My understanding is very limited on text. I appreciate your vlog content.
There are actually a lot of factors that go into designing these generators. It's not just number of loops. You also have to consider friction, weight, magnetic field strength, rotational speed, etc. Engineers are also add in gear systems to help speed things up.
If charges displace/move along a conductor that cross magnetic field lines at right angle etc as we are told exactly what takes place. Therefore If you take a long conductor cut in half and install a light bulb there, would a reciprocating up and down motion of one end of the wire instead of rotating the conductor and going through no magnetic field line being cut cause the bulb to lit up and why not? Making a note that this set up has no so-called return wire which we are taught needed to complete the circuit.
It's nice. But the DC motor is confusing. DC motor without commutator will not rotate. Is this done by removing half of the insulation coating on the connecting part of the coil?
Maxwell built a generator that spun continuously once started that produced a voltage at the outer rim of a round copper plate sandwiched between 2 ring magnets and drove a generator which also produced an electrical output but he never pursued it. In the 1980s Bruce de Palma perfected that setup at got 10 kv from that similar setup and he pursued it and died shortly after after releasing his plans to the world. Seems like a generator will also produce electricity if the magnet and copper are spinning together. Good video keep up the good work.
How do you take initiative into using that voltage? In other words what’s the next step from creating the voltage to harnessing the voltage? For instance the outlet that’s gives our devices power. What’s next?
The voltage is the _potential_ to move charges. If you provide that voltage will a closed loop of (mobile) charges, then that voltage will move them. Once charge is moving, you've got a circuit.
If you coil copper wire around a hollow, circular, non-ferrous tube with an axially-poled magnet in it and spin it (shake it like how a hula hoop works), does it create a DC current because the magnetic field does not reverse? Is there a simple enough explanation for how many turns/ wire size/ current generation vs wire resistance? I am toying around with a project for a simple light without batteries and for someone who never took physics, I’m a little lost! Thank you in advance!!!
If the magnet only spins along its magnetic axis, then the magnetic field wont change and you won't get current. The magnet has to either spin along a different axis or it has to change position for the magnetic field to change. If you can do that inside a coil of wire, then you should be able to get a current if the coil is connect to a close circuit. Like you said though, there's a trade-off. More turns in the coil means more current, but only up to a point. Eventually, you'll have so much wire that the added resistance will prevent further increases in current. There's no way to predict in advance where the limit is. It's trial and error, unfortunately.
1) Can you say something about voltage potential and emf? Is there any difference? 2) Without a battery we can make a generator just spinning that copper loop inside a B field. Do charges accumulate in loop's endings? Thanks!
1. No, there is no difference between potential difference, voltage, or electromotive force (emf). They are all the same thing named independently by different people. 2. No, without a path, the charges won't actually move. If the copper loop isn't connected to anything, all you get is a voltage across the gap.
@@ScienceAsylum In no.2 I always thought that charges move back and forth like AC. At loop's endings there would be charge accumulation (like a capacitor in AC circuit) and at the gap in beetween there would be dE/dt (displacement current). Am I mad? o.O
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Oliver Heaviside is the most underrated scientist ever. In school they teach us about Galvano, Ampere, Tesla and so on, but never Heaviside.
Oliver Heaviside was an autodidact (self-taught) mathematician and physicist. He coined all the terms used in AC circuit analysis, he invented vector calculus and his work changed telecommunications.
Fun fact: since he wasnt formally educated, he was in conflict with the scientific establishment his whole life
That's hardly a "fun" fact.
@@stuckonearth4967 It's not just Heavyside. Elon Musk naming his company Tesla may be the only reason we know that name. The masters tried to sweep him under the rug and discredit him too. The crime is not being self taught it's anything that redistributes power or wealth from the masters. This goes back to ancient times and the story of Prometheus who stole fire from the Gods in 500 BC. Zeues crucified him to rock and had an eagle eat out his liver, which would regenerate so Prometheus could be tortured again the next day at infinitum. The moral of the story is when you discover something and don't bring the current powers that be with you unveil it the power you unleash may become so imbalanced that it lashes out against you. So unfortunately advancements will probably have to include big oil and the most polluting companies or they may react so sharply against that new scientist, that he will join Heavyside, Tesla, and Prometheus.
@@stuckonearth4967 elon musk fan bois never fail to embarass themselves.
Passing some neutralizing material between magnetic force, impossible?
Am doing but electricity and am still to write ordinary level
What non-scientists don't appreciate is that the entire world's economy depends on coils of copper spinning in magnetic fields.
but... surely there is a better way than one made up 200 years ago....? We've improved it's efficiency, but you'd think with everything we've learned in 200 years we'd have come up with something new?
Signature Edits I’m not sure the there is any way around the copper coils and magnets but the method in which we turn these generator turbines is insane. Our first idea has been one of the best. Use falling water. But then the next 2 are out there. 1.) Let’s dig up
Old dinosaurs and plants from millions of years ago, light it on fire and boil a big pot of water to create steam. The steam will turn the turbine. 2) If we can split a uranium atom we can release a lot of heat to boil a big pot of water. The steam will turn the turbine. So let me get this straight you split the atom to boil a pot of water. Way to go
Shut up...uh bunghole.
@@ronbrennick7351 Yes sir. Sorry Ron. Didn't mean to offend. You give great advice which I will follow starting . . . now. See you at the gay bar tomorrow.
Gaybar what, your dad is at that bar with your uncle and cousins if you meet me there you'll be going to a family reunion and your uncle father will be there too.
i love that you always explain words . it really removes misunderstanding.
This is very necessary in science. In very glad he does that
Yes Azis, V-allah
Your absolutely correct
@@lordhapuokami5488 there is an option to translate your comment to English. The funny thing is that is says the exact same thing.
He is really an ace by that aspect.
Your videos should be mandatory in school as an introduction to a new subject, they usually make it SO much easier to understand a course. Many teachers know the subject, but they can't teach it. Your videos are usually "reference level" in both cases...
AGREED!
Already our teacher had this idea but the principle again ....... I know principle in an Indian shools😤😤😤😨😨😨🙍🙍🙍🙍🙍👈👈👈👈
OMG
Couldn't agree more
nice
I think the important thing that people often miss is that when current in drawn from the voltage source (so power), a torque is created so that it impedes the rotation. So we don't only have to make spin the rotor "once" to give it momentum, but apply a constant power at least as much as the drawn electric power.
Yes, this is very important.
I don't think anyone misses that. If you could spin a rotor with one push and it ran forever and ever having a perpetual motion machine there would be no issues regarding power or the climate. Perpetual motion machines aren't even really pursued anymore except as UA-cam click bait. All the solutions for clean renewable energy have been invented. Will we have the resolve to implement them or will we go down in history as the monsters that set in motion the destruction of all life on Earth. Knowing full well it was happening and how to stop it, but did nothing.
@@anthonypape6862 Your'e in the good side but trust me, almost 99% non tech would imagine that it might be possible to retrieve more energy (and especially because they don't really feel what "torque" is but only speed).
I have a vid with exactly this point explained, it has +2M views, and it's not sufficient to convince everyone!
@@ScienceAsylum how is the valence of the conductive metal refilled after electricity flows though it? i realize it they are lost and contributed one to another in a flow of electrons down a wire but somethings has to refill the valence shell electron in the original atoms that was lost. Anyone know??
@@Acuraintegraman1 It doesn't _need_ to be refilled because it's a closed circuit. Imagine a closed pipe system where water never leaves. Do you need to refill it with water?
This has to be in the top 5 channels on youtube. Incredible explanations and hysterical commentary. I think I've laughed to tears at least three times watching this channel.
I'm 14 and I just wanted to randomly create an induction generator, and I was wondering if I could have a little help.
This is amazing! I'm studying EE, so I've already read about electromagnetism. This series of videos help me understand the concepts.
This channel is great for easily explaining & visualizing complex topics/concepts. It’s my new goto for everything science related.
I jumped on this as fast as I could and you already had 230 views and 38 likes. Keep this up dude, you not only matter so much to me as someone that was screwed out of a proper formal education in the sciences, but I pass this stuff to my (at the moment:) 9yo nephew and use it to explain things ostensibly "beyond" his ken. You're making a huge fucking difference, man, keep going, even though it won't be immediately visible. You're not just making my 30yo ass smarter, but I use your material to encourage kids I know. KEEP THIS UP, and I'll be supporting you via patreon in a few weeks (sorry, I'm poor :C)
Thanks!
FastFast
Showering wealth on society by distributing good info👌
6:20 We don't always turn coils. Usually the coils are fixed to the stator and the rotor has DC excitation to cause the change in magnetic flux but the same thing really
3:30 It's also worth to mention that when there is something connected drawing current from the generator, it gets harder to spin (I guess you'll cover Lenz's Law in a future video). That's why infinity energy generators don't work.
When there's no current flowing, all the force you apply is turn into motion, and since nothing is consuming energy, the coil would continue to rotate indefinitely, if there was no losses due to friction and drag. However when something is connected, creating an electrical circuit, part of the kinectic energy of the coil is turned into electrical energy. Thus if the torque applied is constant, the angular speed of the coil will reduce, or conversely, to make the speed constant, a higher torque is needed.
This a good point and something that might be worth doing a solo video on. I remember we did experiments like this in physics class. Let a pendulum swing through a magnetic field and it swings normally. Replace the head of the pendulum with something conductive like copper and the pendulum swinging stops really quickly, the breaking action is really evident. What's going on is that the magnetic field induces a current within the copper, little electrical loops. Because this takes energy, the energy has to come from the motion of the pendulum. Hence the pendulum stops moving very quickly because those current loops are actually using up a lot of energy.
The point of the lesson was the same as yours: perpetual motion energy-making machines don't work. That energy really has to come from somewhere, and there ain't no free lunch.
Indeed!
@urmthrwan The coil itself has some intrinsic resistance, so it would dissipate heat over time.
@urmthrwan Yes, in theory it would be possible if you also eliminate the mechanical losses (friction and drag). It makes sense considering that the power is given by the product of the voltage across a device by the current passing through it: P = V x I.
Usually, the power is zero if there's no load, meaning there's no current regardless of the voltage generated. In this setup though, there would be no power dissipated because there would be no voltage drop between the ends of the coil, regardless of the current passing through it, so the power equation becomes zero too.
I don't see any practical application of this kind of generator though.
Power Management.
Question not about electricity but black holes: An old video mentions that there is infinite time dilation at the event horizon; a distant observer would never see a falling clone cross the event horizon. So how to black holes feed or merge, and how can we see evidence of it, if the time dilation for objects falling into a black hole is so severe that it never "happens" for us?
For a distant observer, it doesn't actually matter if stuff crosses the horizon. If it's close, it's still adding to the mass located in that general area.
The Missy Elliot reference was epic! Possibly your funniest antic Nick.
I'm glad someone else caught that
XD
Best explanation of what voltage is... ever. I finally understand it. Thanx.
Pushing a wire side ways in a magnectic field should cause current, brilliant and very clearly explained. Now I know exactly how the relationship between current and magnetism works, great video...
Thank you, this is what I wanted to know! I kept trying to look up how rotational energy is actually converted into electrical energy, but all the results and other UA-cam videos just kept skipping over the electromagnetism part! Y'know, the part that actually converts the mechanical energy to electric energy. This is such a fantastic video!
Glad it was helpful! 🤓
I wish I had discovered this channel years ago! Absolutely profound insight along with an impactful delivery that makes us viewers engaged! WELL DONE SIR!
Very very very underrated channel
Have to be honest, first time watching one of your videos I felt like they was meant to be just for kids, but now I really enjoy each one of them. They are explained so well, in such details without all that misleadings examples that are used to supposedly help us understand.
I hope you keep doing it for a long time and I expect to be one of your patreons soon. I think I may help you with spanish subtitles so I could recommend this channel to more people.
Thanks for your work!
Thanks! I try to put something for everyone in my videos :-)
Usually it's the magnet that spins, and not the coils. It's easier to extract power from stationary coils. The magnetic field can be created by a spinning coil, but it operates at a lower voltage which can be passed into the rotor by slip rings or a transformer
Essential viewing for students wanting to get into these subjects. Great explanations..
1:03 from the right hand rule it should go in opposite direction, is it true? :O
I was showing electron flow, not "conventional current," so things are backwards.
@@ScienceAsylum oyaaaa btw one of the best channel on yt with all those visualisations worths more than a thousands of letters in the book :D
@@ScienceAsylum so i guess that means that the direction of the magnetic field on that axis doesnt matter for the Lorentz Force? both the conventional current and electron flow in that wire create Lorentz Force in the same direction? (of course it needs to be perpendicular, but already is as seen in video)
“ To the time line!!” ;) Another rather rather g o o d piece of edutainment. It’s the balance of competence and humor that we , your fan community are unable to resist.
Why isn't the wire on the left at 1:20 also shown as generating a magnetic field? And why does the wire on the left move away, instead of the wire on the right move away -- or both move away from each other? Not explained. Very confusing.
1) You are correct. If the wire on the left has a current, then it also affects the magnetic field. I didn't include that because it would have distracted from the point I was making with the graphic. At some point, in any diagram, you have to leave things out for clarity.
2) As far as the wires moving, assume the wire on the right is attached/fixed to the table. Problem solved.
I'm taking physics, and I'm going to ask my teacher if we can watch your videos. He use to be a professor.
This is the best science channel on UA-cam, by miles.
I am master in Electric engineering and still enjoyed every minute of this video. I guess I just like the topic and you explaining :D
Fty
Becouse he humanizes physics with his crazy delicious - face 😊
Hey I have a question, if charge moving inside a magnetic field experiences Lorentz force due to it's motion, so can we conclude that Lorentz force is the cause of electromagnetic induction? Because while moving a wire inside a magnetic field we are providing some velocity to the electrons inside the wire due to which they experience Lorentz force and since this force is applied on electrons, we can say that this is some kind of electrostatic force so we have a electric field inside the wire and hence an electric potential. So can we say that Lorentz force is the cause of electromagnetic induction?
Yes, definitely. That's the way I would explain it, at least conceptually. Mathematically, that's not very convenient, which is why we have Faraday's law instead.
@@ScienceAsylum Exactly! But by Faraday's Law, we can see the effect of electromagnetic induction. I mean we can use the equation to get the potential generated in a coil but Faraday's Law does not provide any reason for this phenomenon. Maybe because all Faraday did was conducted experiments and provided a mathematical equation to satisfy his results.. And maybe he never bothered to find out the cause of any phenomenon he observations..🤔
Oh and by the way thanks for replying to my comment🙂
In fact, Maxwell's _original_ equation list didn't even (explicitly) include Faraday's law.
0:42 I was almost sure he was about to say "Or is it??"
I have some questions.
1. How is the interaction between the electric current that is flowing through the copper wire and the metal filings?
My assumed answer is that the metal filings are being magnetized and so they are drawn to the copper wire, but I am not sure.
2. When a magnet is spun around a copper wire coil, is the wire producing electricity because the electrons from the wire are being stripped? Where exactly is the electrons coming from? The air? Or the copper wire itself?
3. As a magnet is spun inside a copper coil, is the coil then electrified? Then is that how we transfer the electricity to some kind of conductor that will then send that power to our homes? Want to know more about how the generators are functioned.
4. Last question for now, if electricity is simply electrons that are stripped from negatively charged atoms, then what is the nature of electrons? Is their nature just to flow and transfer that energy until it can settle somewhere?
One more question, if magnets repel each other if we face the two like poles, could we not use that repulsion force to spin the generators in powerplants instead of using external power sources like coal, steam water and air?
If we could use thatrepulsive energy, we could then have it recharge the magnets so that it can be strengthened so that the energy does not decay over time and use the excess energy to power our appliances.
Just thinking of future ways we could not have to rely on external power.
1. Yes, the iron filings become magnetized and align themselves to the field created by the current. I talk more about magnets here: ua-cam.com/video/XczMRsiq9mk/v-deo.html
2 & 3 & 4. No, the wires remain electrically neutral the entire time. We're not gaining or losing electrons. We're just moving them around. That's why a closed circuit is necessary for current to flow. Any electron that leaves a wire must be replaced. I talk about electricity flow here: ua-cam.com/video/QKxep82_9b8/v-deo.html
We always have to rely on external energy. As a generator transforms energy, that energy leaves and must be replaced. The same goes for magnets. As you use "permanent" magnets, they demagnetize.
Electricity may be man`s greatest discovery to date. The ways in which we use it now makes it difficult to think how we would have to live without it.
That's what Steampunk is all about. It's an alternate history fiction that explores what our modern world would look like, if electricity were never discovered.
Sir,you please explain the mechanism of producing electric current from magnetic field with a diagram. I have read many a times this,but still I cannot understand.
Best yt channel for education
But sadly underrated
This channel deserves million subscribers
sadly it seems education is underrated
I have to add to the beginning of this comment, all credit to Nick, he did mention the wire was insulated.....
I know this is a really basic point to make, but I've noticed in the past when someone who is attempting their very first coil, they don't realise that the copper wire here is actually insulated and then, don't understand why their coil doesn't work because they've stripped down to a bare copper wire to start their coil.
Science Asylums copper wire has a thin clear lacquer coating to prevent the wire from touching itself.
Yes, correct. Thanks for pointing this out.
This guy cracks me up. You can see the child like curiosity in his passion. Thats so beautiful.
The microphone you talk into converts a metal plate's motion into electricity. A magnet provides the field and a coil collects the current. Vibrations from your voice make the mic's plate vibrate, same in guitar pickups where the strings replace the plate. Scream close to a guitar string, and the amp will actually project your voice.
Indeed!
Pls can u make a video explaining what voltage actually is ?!?!?! 🤔🤔🤔
Voltage is actually the potential for charges like electrons in the electric field. A potential is always the difference of energy of the particle at a point compared to the energy at a reference point diveded by the charge itself. So if you multiply the voltage (or the potential) at a point by a charge you get its energy at this point. Or in other words the higher the voltage, the higher is the energy of charge at that voltage.
By energy i mean the potential energy und note that you dont always divide by the charge. For example there is also a potential for the gravitational field which is the difference of potential energy divided by the mass. So in general the potential of a force field in physics is the potential energy divided by the quantity which causes the force. The cause of the force in the electric field is the charge.
Almir Zeqiri fgfgsh
If I am not mistaken, in hydro power plants and probably in other generators too, the coils are static. It's electromagnets that rotate alternating south and north along the coils that go around the rotor.
Valuable video. Explained the meaning of the equation for Faraday's Law. This stands out in another level of explanation!
How does ac work,if the direction of current changes every time then how does it flow from 1 point to other i don't understand?
The changing direction of current means that the electrons don't move very much. What's moving is the energy they carry. You can think of it as a wave. If you have a wave pulse travelling a rope for example, the rope itself doesn't move forward (only up and down), what does move forward is the energy pulse.
AC _doesn't_ flow from one point to another. The charge never goes anywhere.... but it doesn't have to. You just have to get the _energy_ to go places. Whether the charge goes places or not is irrelevant.
Technically it will also depend on the kind of load it's connected to the AC power supply, some loads, called reactive loads, don't use the electric energy generated, they basically store the energy and then give it back to the generator, so in the case of an ideal reactive load, there would be no energy transfer. Using the wave analogy, it would be like a stationary wave or an harmonic oscillator.
My next video is going to help clear a lot of this up.
In calculus I always heard about the "Heaviside step function" and I honestly thought it was "heavy-side" like heavy vs light and had something to do with taking the value of 1 rather than 0 at 0 until I quite recently (but not today) learned there was a physicist named "Heaviside" who invented electromagnetism and vector calculus.
He's so underappreciated! It just goes to show where _bad_ social skills will take you in life.
Taylor Polynomials is another interesting coincidence where the mathematician's name describes the concept he contributed to mathematics. A Taylor polynomial is tailored to match the function.
Hi SA. 50 years ago there was a toy or pond with water, size was about 10 inches across and 1 inch deep. Floating on the top was 5 or 6 plastic ducks each having a small 1/2 inch battery. The magnetic forces moved the ducks around the pond and did so for hours. That is the concept or problem,, can the magnetic force trigger electro magnetic inducer to capture energy but on a larger scale.?
I wish I had a chance to watch these videos when I was a kid... After decades and all technical studies, watching your videos is priceless.
This is one of the best explanations on the subject I have watched!
Thank you, your video explained it really well, i love how you made it clear that magnetic induction/spinning coils around is the actual source of energy. I was really confused trying to understand how Nuclear Powerplants work
The original source of our energy is the Sun. All we do is convert energy to a more convenient type. We have never made or destroyed energy. It just is, and it's free in the raw state as when Sun bathing. All conversion is costly and has inefficiencies. Sun to electricity by photovoltaic panels, wind to mechanical, to generation, fuel to mechanical to generation.
Hello!
In the experiment that you showed later on in this video (5:10) When you connect the coil to the battery, doesn't it become a solenoid? And so, why doesn't it get attracted to the magnet when it is spun, causing it to stop spinning.
How long does it take you to upload please more
I upload twice per month. It's best I can do. These videos take forever.
@@ScienceAsylum thanks for the amazing content
2 Questions: 1) Does it matter if the magnet is moving vs the coil or must the coil be moving? 2) If I have a coil of copper wire of lets say 400 turns and that coil has inside diameter of 1". Is it better to have a magnet go through the inside of the loop or better to have magnets pass by the outside of the loop, perpendicular to it?
All motion is relative, so which thing is moving makes no difference. All that is required is that they're moving _relative_ to each other. The same effect will happen either way. (There is a difference in engineering a device though. Magnets tend to be a lot heavier than coils, so it takes more force to move them. It's easier to make coils move.)
@@ScienceAsylum What about the magnetic flux. Must the magnet pass through the opening of a coil or can you have a magnet on each side of the coil. For example 1" square magnet, whose north pole is facing the ceiling goes through a coil of wire much like being dropped through a cup with no bottom as option 1. Option 2 is 2 magnets separated by the width of the coil (still in position like the cup with no bottom on the table, each magnet now has it's north pole facing the south wall in your home. These two magnets swipe by the coil from the ceiling to the floor. The flux going through the coil perpendicular to the winding's. Is one option better for induction?
The Science Asylum any thoughts on that next question? I really appreciate it. Big fan
I just hope UA-cam recommends your videos like it does for other physic channels as I believe you should have over a million subscribers already. Thanks for the videos nevertheless. You are awesome
Your comment is turning out to be true. Haha ! 3 years later, Nick has more than 50 Million views on UA-cam ...
Why does a moving charge make a magnetic field?
“Why” questions seldom get useful answers. Like when you asked your mom and the answer was “because I said so.”
This video presents the concept of induction as self explanatory and circular. Why? Because it's moving! Here's some equations!
I suspect the video creator doesn't even think about such questions because they merely parrot others. The blurb at the end on "good sources of energy" is pure propaganda.
Video title: “Turning magnetism into electricity”
*_Michael Faraday is typing_*
Will you be doing a video on the electroweak force?
Electroweak? Eventually maybe (probably).
@@ScienceAsylum, probably not enough content for 7 shows. Then we could have 'Electro-week'... (sorry)
Free electricity !!
Toasters : /* It's Free Real Estate */
@@krishabm1... I think you have to run a magnet through a coil. I don't think it works with bread you want to toast. I am hungry, I will try it and I'll let you know if using my toaster reduces my electricity bill.
What about the electromagnetic tensor.if you continue this electrodynamics series, i would like to know more about that.
We'll get there. I did _mention it briefly_ in the first video in this series: ua-cam.com/video/gvX29HPmBEI/v-deo.html
This Heavyside guy might be the most cruel victim of history I’ve heard. Tesla empathizes
For real though... (Neither one of them had very good "people skills" so it makes sense, but still cruel.)
The Science Asylum well Newton didn’t have good people skills either. I wonder how much luck it takes and how much marketing for your ideas to be appreciated by the community.
For those who might have trouble visualizing it, the best analogy for voltage and current(amperes) i have heard is a waterfall.
The height of the waterfall is the voltage (the potential)
The amount of water falling is the amperes.
Even if the waterfall is 200 feet tall, if a single drop falls theres not a lot of power there but it has potential if a river were to fall from 200 feet.
And the total amount of work that can be generated from such waterfall would be measured in watts(in electrical terms)
Height × flow = work(power)
V×I= W
You're videos are great! Thanks to you, I decided to study physics
So, if you connected a wire to each end of that spinning copper coil would you produce electricity? I’m looking for a video that shows the simplest way to create electricity with a coil and a magnet.
Saw the notification clicked on this video fastfast. Nice work
You really simplified the concept for me. I was so confused in class and didn't really get the concept. Thank you
Didn't expect a video so quicly after the last one.
Also do u like(believe in importance of) in engineering (i.e. application) or research (i.e. pure and abstract science)?
I prefer theoretical work when it comes to the work I do, but I _value_ the existence of both.
Cool i also prefer the same
Hello crazy.your videos are best
Hi, I asked this before, but perhaps it eluded you. One more shot.
Can you PLEASE explain the apparent chirality of the magnetic field? Charged particles will move in one way out of two possible ways when travelling through a magnetic field (opposite charges create opposite motions). And, conversely, charged particles will create a magnetic field in one of two possible directions (opposite charges create a magnetic field in opposite directions). You have this indicated in your videos. It seems completely arbitrary without a cause; it likely doesn't have a 'cause', but probably the answer is just 'because'. Not even /r/askscience was able to answer this.
Really hoping to get an explanation. Thanks!
The magnetic _field_ is made up by humans. It could have easily been decided to define it the other direction. The magnetic _force_ is a different story. The force represents an effect we can directly observe, so it's not made up by us. In reality though, there is only one way the force can go: the way it _actually_ goes. We make the math match the universe, not the other way around.
@@ScienceAsylum Thank you for replying! So, in the end the motion caused by a magnetic field always happens in direction A, and never in direction B "just because". Have physicists not wondered about why that is?
@@Hier00 physicists always wondered about this. The best we can do is try to find the least rules/assumptions which still produce matching reaults with reality. Probably we will never find an explannation for reality purely on theoretical grounds, since there are many seemingly possible but different laws which could exist. In classical electromagnetism the best you can do is declare a lagrangian for the electromagnetic field, and one for interactions between fields and particles. These are both expressions 4-5 caharacters long, and reproduce classical electromagnetism.
@@zoltankurti Thank you for the reply. This observation just seemed a little arbitrary to me, considering the spatial dimensions. Ultimately, I just wish that teachers would have made a distinction between a phenomenon whose explanation is very complicated and would be studied in later years, and a phenomenon that has reached a wall in science.
Bless you so much for continuing to spread knowledge 🤘🏼
Jesus is lord😇!
What if you spin the magnet around a coil? Would it need to spin around the coil at a perpendicular angle to make it give a voltage? Or what it you spun the magnet around the outside of loop on the same plane?
It doesn't matter which is spinning. It works either way. Magnets just tend to be heavier than coils, so it's often easier to rotate the coil.
I was curious as to how electricity made stuff work, now I'm watching this at 4 am, learned a lot though
Then this one is going to blow your mind: ua-cam.com/video/C7tQJ42nGno/v-deo.html
Genius, speaking that fast, rather speeding up the speech. Our superb minds discern the message even thru the sillinous at the right speed. Thank you
Shame that, we don't learn this in school.
Wonderful explanation! This channel is the Oliver Heaviside of UA-cam. On a positive note, the improved YT algorithm has actually provided me with something useful.
I love everything about this and actually learned things that shifted my perspective. :)
Where are we getting all these magnets from? Are they constructed or found? And if constructed, how much energy do they require to make? I magnetized a screwdriver once, by wrapping a coil around it and giving it 24V for 30 sec or so and half a year later it is still magnetic.
Most permanent magnets are manufactured using electromagnets.
@@ScienceAsylum Thanks, you rock
@@ScienceAsylum Thank you.
one crazy question nick ! imagine if we isolate a black hole ....and start "feeding" ELECTRON ONLY. what will happen if we continue to feed..also consider that black hole also SPIN. will it produce magnetic field also?
Black Holes do have magnetic fields
If they have a charge 👆
@@Private_Duck
If they have mostly electrons, they do have a charge.
I believe it should be plausible. However, getting a black hole charged to the extent that it produces a magnetic field great enough to be used from the distances we can reach would require an immense quantity of charged particles to be sent within it. Nonetheless, as had been said above, they already do have a significant magnetic field.
Yep.
By the way i forgot to add my answer.
If you threw electrons into a accretion (sorry if spellings arent correct) disk, then those electrons will produce a strong magnetic field.
But for a blackhole to have a magnetic field, it must have a charge.schwarzschild bhs and uncharged kerr blackholes wouldnt do that.
you can also reverse the coil and magnet by rotating a magnet inside a coil right?
True! ...but it's harder to rotate a magnet because there's so much more mass.
@@ScienceAsylum Oh yeah true, I didnt think about that
0:41
Nick: _You know what I'm thinking and I know what you're thinking._ *"To the timeline!"*
Edison Tesla electr8city war
Thanks!
Thank you!
"WORK IT! I need a glass of water..." 🤣😂👌
One of your best video! Congratulations.
0:42 “you know what’s coming”
A repeat my answer, given to someone below here too for others maybe wondering/thinking about the first section of the video.
A changing magnetic flux induces voltage first (EMF) and if the circuit is closed (electrons can move continuously) then current will flow: charge will move due to voltage difference - an induced electric field which actually a "curled E" as opposed to a "static E" usually created by non moving "q" (charge).
In the video and in the wires in field part this is not explained. There it says: changing magnetic field induces current or moving the wire in the magnetic field (which also means changing magnetic field/flux), which is "indirectly" true, but really that part assumes, that the circuits formed by each wire are closed. So the induced EMF/voltage will immediately cause the current to flow in the second (here moving) wire too. In the first wire, it also has to be some EMF/voltage source causing the current in a closed circuit. The video and the explanation are still correct as:
- it focuses on just the wire sections or infinitely long theoretical set
- leaves some part of the process for the "student" to think about as later induced voltage is explained, so the "student" could make the connection him/herself.
Anybody here now??
Question: You say power plants use kinetic energy to spin coils inside magnetic fields, but could you do it the other way, could you spin a magnet inside a stationary coil? Would that generate power aswell?
Yes, you can absolutely do it either way. It doesn't matter which is spinning. However, there are practical problem to spinning something as heavy as a magnet.
i understood great
Me too. Me now know good.
I'm just blown away by this. So simple, yet not taught in schools, or at least not in the way you did. Quality upload as usual! Thanks!
You're welcome!
I started my iPad, and your video started on its own...
Your clone must’ve pushed play...
Thank you, pushing clone.
2:15 if green arrow is velocity, and if B points out of screen, v x B points up. But if q is negative (from electrons) , qvxB points the opposite of up, i.e., down.
Correct. Negative charges are always do the opposite of the simple rules.
TIL: Most power plants are just a very very large water boiler.
Fact.
So would moving a motor with magnets and no electricity be theoretically possible because magnets always put out force and with eventually run out of magnetism, so again theoretically wouldn’t there be so way to arrange fields with a big enough magnet or something? I know perpetual machines aren’t real
I wish you were my school teacher
Just wanted to throw some inconsistent encouragement your way. I'm not a scientist, or use what you teach in any way. I'm a meditation teacher. But as a teacher I recognize that you do more than just entertain us or help students pass tests. You are following a passion, discussing the nature of the universe. And despite the fact that it may not bring you wealth or much utility, it adds something important to the question of what it means to be human. You inspire, guide, and provide a positive example of humanness. You've touched hundreds of thousands of minds if not millions. You done good kid. :-) Keep it up. Much Love!
Thanks!
you deserve more, your videos are interesting and easy to understand!, especially for beginners like me =]].
How much torque & how many coils on a loops do I need to produce about 15kw of electricity for an example? How do i regulate the rpm's (frequency)? In other words I need more clarity on the relationship between torque, number of coils on a loop & frequency (Hz). A video on this would very much be appreciated. My understanding is very limited on text.
I appreciate your vlog content.
There are actually a lot of factors that go into designing these generators. It's not just number of loops. You also have to consider friction, weight, magnetic field strength, rotational speed, etc. Engineers are also add in gear systems to help speed things up.
I'm like question clone. Pointing out the details. Curious.... Lol
If charges displace/move along a conductor that cross magnetic field lines at right angle etc as we are told exactly what takes place. Therefore If you take a long conductor cut in half and install a light bulb there, would a reciprocating up and down motion of one end of the wire instead of rotating the conductor and going through no magnetic field line being cut cause the bulb to lit up and why not? Making a note that this set up has no so-called return wire which we are taught needed to complete the circuit.
1:31 they look so cute from the side view 🤗
Anyone agree?
The clones are the best
It's nice. But the DC motor is confusing. DC motor without commutator will not rotate. Is this done by removing half of the insulation coating on the connecting part of the coil?
Yes, only one side the wire has the insulation removed.
Yes more "to the time line!" haha
Maxwell built a generator that spun continuously once started that produced a voltage at the outer rim of a round copper plate sandwiched between 2 ring magnets and drove a generator which also produced an electrical output but he never pursued it. In the 1980s Bruce de Palma perfected that setup at got 10 kv from that similar setup and he pursued it and died shortly after after releasing his plans to the world. Seems like a generator will also produce electricity if the magnet and copper are spinning together. Good video keep up the good work.
Who’s here from Dr. Stone ?
How do you take initiative into using that voltage? In other words what’s the next step from creating the voltage to harnessing the voltage? For instance the outlet that’s gives our devices power. What’s next?
The voltage is the _potential_ to move charges. If you provide that voltage will a closed loop of (mobile) charges, then that voltage will move them. Once charge is moving, you've got a circuit.
If you coil copper wire around a hollow, circular, non-ferrous tube with an axially-poled magnet in it and spin it (shake it like how a hula hoop works), does it create a DC current because the magnetic field does not reverse? Is there a simple enough explanation for how many turns/ wire size/ current generation vs wire resistance?
I am toying around with a project for a simple light without batteries and for someone who never took physics, I’m a little lost!
Thank you in advance!!!
If the magnet only spins along its magnetic axis, then the magnetic field wont change and you won't get current. The magnet has to either spin along a different axis or it has to change position for the magnetic field to change. If you can do that inside a coil of wire, then you should be able to get a current if the coil is connect to a close circuit.
Like you said though, there's a trade-off. More turns in the coil means more current, but only up to a point. Eventually, you'll have so much wire that the added resistance will prevent further increases in current. There's no way to predict in advance where the limit is. It's trial and error, unfortunately.
1) Can you say something about voltage potential and emf? Is there any difference?
2) Without a battery we can make a generator just spinning that copper loop inside a B field. Do charges accumulate in loop's endings?
Thanks!
1. No, there is no difference between potential difference, voltage, or electromotive force (emf). They are all the same thing named independently by different people.
2. No, without a path, the charges won't actually move. If the copper loop isn't connected to anything, all you get is a voltage across the gap.
@@ScienceAsylum In no.2 I always thought that charges move back and forth like AC. At loop's endings there would be charge accumulation (like a capacitor in AC circuit) and at the gap in beetween there would be dE/dt (displacement current). Am I mad? o.O