I think this explanation is a bit over-complicated... but can I do better? Here goes. Volts (voltage) is kinda like water pressure. Amps (current) is like how much water is flowing. Think current, as in the current flowing in a river. Just like water, if there is no pressure, then the water won't flow. If there is more _resistance_ (say, a river with many twists and turns, or a narrow water pipe), it will take more pressure to make the water flow. This is just the same as electrical resistance (which is measured in _ohms_). Usually, if you have a source of electricity, it will be supplied at a certain voltage. Say, 120V or 240V. This voltage normally doesn't change much, regardless of what you plug in. Depending on the _resistance_ of what you connect to it, a certain _current_ will flow. When you have both _voltage and current_, power is used. Power is measured in _watts_. If you don't have anything plugged in, that is (more or less) a resistance of infinity. No current will flow. As you might guess, there is no power used. If you short circuit your electricity supply, that's a very low resistance. Plenty of current will flow. Lots of power is used! To carry lots of current, you will need thick copper in your wire. The electrons flow in the copper, so you need a thicker "pipe" if there is more flow. If your supply is a high voltage, you will need thicker plastic insulation around the copper. Just like you need a thick walled pipe to keep lots of pressure from bursting out. Perhaps you have a heater, which is 1,200 watts, or, 1.2 kilo-watts (kW). This is how much power it will use. Of course, your electricity bill will be higher if you have your heater switched on for longer. If you run it for 10 hours, you will have used 10 times as much energy as if you ran it for 1 hour. This is why energy is measured in kilowatt-hours (kWh). That is, the number of kilowatts of power used, multiplied by the number of hours it was used for. Running your 1.2 kW heater for 10 hours will consume 12 kWh. The expression "kilowatts per hour" does not make any sense (unless there is something very, very special going on!). Batteries are slightly unusual, as they are measured in how much current they can provide, for a certain amount of time. This is because of chemical reasons. So, your battery may be able to provide 2 amps for an hour. This is a 2 amp-hour battery. If the battery voltage remained exactly the same, this would equate to a certain amount of kilowatt-hours, but sadly the battery voltage drops somewhat as it runs flat. This makes it more complicated, so amp-hours is the preferred unit of measure. Now for some maths: Voltage = Current x Resistance (V = I x R) Power = Voltage x Current (P = V x I) An example - your 120V, 1.2kW heater. How much current is flowing? Put those numbers into the second equation. P = V x I 1,200 = 120 x I I = 10 amps. Easy! What resistance is your heater? Put the numbers into the first equation. V = I x R 120 = 10 x R R = 12 ohms. Let's plug your heater into 240V instead! How much current would it draw? V = I x R 240 = I x 12 I = 20 amps. Twice as much! How much power? P = V x I P = 240 x 20 P = 4,800 watts! That's four times as much! This may be a surprise. Your heater will certainly blow up. Did I do better at explaining it? Please let me know!
That is called learning. You didn't fail chemistry, your instructor failed to teach it so that you can understand it. If you retry chemistry today, I bet it will make more sense. Some things do not take hold in our youth. Retain enough learning and master it and you get to call it wisdom. Then you should dispense it, because it will do you no good to take it to your grave.
Thomas T He failed. He skipped class to go smoke weed with his little stoner buddies. I’ll give you the benefit of the doubt and say you are optimistic but you are also naive. Let this be a lesson to you. Don’t always assume the best.
Hey...I wish you well and hope you enjoy your future endeavors. It is largely a thankless job, but great teachers (which is what I think you'll be due to your concern and purpose well before it's becoming a reality) are what help develop children with less than stellar parenting into upstanding citizens in the future. I just hope some of these strange political stuff is toned down in the classrooms, especially for the youngsters.
One misconception I'd correct here is thinking of the cell (or battery) as a reservoir of electrons ready to flow from negative to positive. It's not that. It's more like a pump, which pushes the electrons that are already in the wires and components around. The model I use is to have students hold a loop of rope, and one of them pulls the rope through their hands. That person is just a pump - they don't have a big reel of rope in their pocket.
My light just turned on for the first time. I'm married to an electrician and this is the best I have ever heard. Now I can talk like him and I want my EFI plugs back and a sine wave power control to hook up my telescope and computer. Im sure you get this. No more watts for me . I need to see my currents at play and know if I'm rated in all areas to safely protect my 6,000. Equipment. Your the best.
@@ortegajones4929 positive to negative is what's called "conventional current", which was the original theory of how electricity flows. This was later discovered to not be true (it flows from negative to positive), but many people still teach and use conventional current for circuits and such, mostly because it was already pretty well established and would be hard to change
@@ortegajones4929 amazing how you couldn't accept being viewed as ignorant.. your reply is more embarrassing than the idea of you ignoring that electricity fact.
Linus I've been following your channel for a while. I've watched many youtube channels trying to understand the concepts of voltage and amps. Some of them even used the water analogy. I almost gave up trying, until I saw your video. There's something about hearing it from the right person that makes it click on a persons brain. Thank you so much!
*You just taught me in 4 minutes and 12 seconds what my idiotic "Science Teacher" in high school couldn't in several YEARS.* I DON'T CARE about the equations, I DON'T CARE about the graphs. I CARE ABOUT PRACTICAL APPLICATIONS. If he couldn't understand *that* then he didn't belong in the teaching profession AT ALL. Do those other things matter? I'm sure they do! But they are MEANINGLESS without exactly what *you* just explained here being taught FIRST! I'm guessing I'm hardly the only one who failed science in high school *because my high school science "teacher" FAILED ME.* Bravo to you!!! YOU DESERVE A MEDAL!!!
everyone is discussing whether or not well explained, and I was just looking for someone like me how enjoy the off-shoot in this video thanks Carsten Svendsen
I am about 30 years old, This is the first time i am coming across a person who has explained these units in such simple terms. I wish i had seen this in my school days. Better late than never
In physics terms: Electricity is measured in units of charge Voltage(V)=how much energy per charge Amp(I)=how much charge per time Wattage(P)=how much energy per time Therefore P=V×I Imagine electrons as trucks carrying energy. High voltage means each truck carries a lot of energy. High ampere count (current) means many truck passes through.
wait, so US also uses kilowatt hours? But.. but that's dirty metric system! I thought they have something like 3 arm lengths of electricity, or something along those lines, they used to measure things in body parts.
The reason why it is called KiloWattHours, is because when you multiply two things together you will have to multiply the units as well, like how you do with the area, 10m * 5m = 50m^2. So if your device is running 1k Watt (per hour), and you used it for 24 hours. 1k Watt * 24 h = 24kWatt * h. That is why we have to keep the hour included, else you wouldnt have known whether that number is your total usage or just a usage on a specific period. Hope it helps
I know this comment is 4 years old, but I think I'm either still slightly confused, or *maybe* I understand what you're saying. So originally (after watching the video) I was thinking a "Oh, so a kWh is the average amount of kilowatts you're using per hour over the course of a given period of time." (in the case of an electric bill: 1 month). However after reading your comment it sounds like I was woefully off the mark. -_- Linus had also mentioned that "Light Years: Not Time", and while he's technically correct (Light Years are a measure of distance), it's also not wrong to consider it in the context of time (i.e. "If I were moving at the speed of light, it would take me this many years to travel from Point A to Point B"). Using this mental framework when trying to understand your comment, are you saying that a Kilowatt-hour is actually summarizing "If you were continuously and precisely using 1 Kilowatt of power per hour [during this billing cycle] this is how many hours total you would have been running your power"?
@@OfficialCharcuterie Let's take some concrete examples. For a total of 24kWh to be used, one could either use 1kW for 24 hours, 24kW for 1 hour, 12kW for 2 hours, or any combination of factors that multiply into 24. In this particular case, there are only 2 factors--one being power (watts / kilowatts) and the second being the duration for which it is used (hours). A kilowatt-hour is not a summary of what you mention in your comment. Rather, in this context, it is simply a unit of total energy consumption. However, since [kW x h] = kWh, knowing any two values in the equation will allow you to easily calculate for the third. Hope this helps
@@shootinbruin3614 Aha! Okay - very much, yes! Having it expressed in terms of "an equation with known and unknown variables" was incredibly helpful. Thank you!
I have watched a few videos on this subject and was always confused. This finally cleared it up. One more analogy incase someone needs it. If you think of a can of hairspray, volts would be the pressure in the can If you press the nozzle down, the amps(current) would be the measure of how fast the hair spray comes out Watts would be a measure of how much hairspray was used in total
@Rio Pruitt I think it's like that in all trades or jobs you go to school for. They push so much info out at you in college or trade school and you forget a lot of it by the next semester. You'll eventually get it on the job like most things. People will still be showing you and teaching you if you have questions about something and eventually it will all make sense. I still have a hard time with all this in welding and get it so confused still on my welding machine. I know how to weld, but it helps if you know exactly what voltage and amps does cause then you can tweak it just right to make a perfect weld. Something else I haven't got yet and I don't think anyone in my college did was blueprint reading. I think one reason is because our first teacher never really taught it and in the second class he gave us blueprints that seemed really advanced to learn from. They were like huge pages with many parts and about 7 pages to each one. It was overwhelming. They push each thing you learn so fast that it still doesn't make much sense by the end. Knowing about half or more than half of it is better than knowing none of it. It makes it easier to learn on the job.
Great video guys! I find this concept is extremely difficult to explain to people who aren't engineers (like me). Based on the way you explained it, this will be the first video I recommend to anyone wanting to learn more
@@dryagedmilk It kinda is, actually. A lot of electronic devices these days have switching supplies which can accommodate a wide variety of input voltages and will always draw the same power (allowing small differences due to conversion efficiency). So for something like a computer, he's right - it would “just use more amps.”
Why did my teachers not explain all those units and relationship between them like this man.... Genius analogy explanation. Finally understood this after 13 years during 5 minutes...
I love that you made me smile while learning! That’s the best way for me personally to retain things. Connecting humor and lightheartedness with practical application is a clever and effective way to teach. Well done!
...but the voltage in Monaco is 230V, and in New York it's 120V, so if you plug in that hairdryer in NY it will run at half the voltage, so it' won't explode, but will blow air at a slower speed... which you explain when you compare Power and Amperage. Blame the editor
Interestingly, to run a 1000W US hair drier (110V) you require double the current that is required for 1000W European (230V) hair drier, which explains why the cabling is a lot thicker on US goods, as the cable needs to be able to carry the higher current. Power = Voltage x Current
My hose has a jet setting. The water shoots out super fast, which feels like it's actually spraying more water. In reality, my plumbing can only push so much water out, and that volume is already maximized with the open hose. So, it doesn't fill a bucket any faster if I use the jet or not. When I use the jet nozzle it increases the PSI (volts) by decreasing the nozzle diameter (amps), but in the end it's still spraying the same amount of water (watts).
For those wondering: a kilowatthour is 3.6 megajoules and a milliamphour is 3.6 coulomb. When dealing with AC the whole deal gets a little more complicated but it's a similar idea.
I've always imagined electricity as traffic on roads or highways. Voltage being the speed on the highways and amperage being the traffic. I guess wattage in this analogy would be traffic per hour at a given speed and amount of traffic.
Amperage is measured in time, (electrons passing per second) so you shouldn't think of voltage as the speed of traffic because it would imply that the more volts, the more traffic is moving past a given point per second. Think of volts as "pressure" or "muscle". Remember, volts are being created by some sort of physical "muscle" or turbine that physically moves to "push" the electrons forward. In the traffic analogy, you can think of volts as the physical horsepower of the cars on the road. So if the traffic maintained the same speed and there were the same number of vehicles, but suddenly all the vehicles turned into tow trucks, the voltage (horsepower) would increase while the amperage (number of vehicles per second) would remain the same.
no, water in a pipe is easily the best explanation. the different terms and concepts match up really well. water pressure = voltage (volts) size of the pipe = resistance (ohms) how much water flows through the pipe (voltage/resistance) = current (amperes) how much water flows * how much pressure it took to move it (current*voltage) = work or power (watts) gallons of water per unit time = amount of energy used or contained (watt-hours or amp-hours)
Thank you for this video. I’m not an engineer or electrician or whatever, but I can (and do) basic DIY wiring around the house. I’ve watched many UA-cam videos to learn how to do this safely, but never been able to figure out why. Why are breakers/wires in amps? Why is my power bill in KWh. Finally....I understand what it all means.
Wow this answered so many questions!!! Studying solar power batteries and voltage with amps and everything I am usually left with more questions than answers! This is probably one of the first videos I have ever watched or I did not feel like I was left with more questions! Thank you so much and please teach me more!
Due to fps and pixel persistence it can be seen as spinning both ways. Actually for me the inner wheel spins clockwise and the outer anticlockwise. Try it with different video speeds.
It's officially standardised at 230, but with large tolerances so countries using 220 or 240 can stay at those voltages but still be compliant with the standard..
Sean Anderson If you're talking to me, for god's sake people, I just took an opportunity to say something. Take a chill pill. This isn't how you make friends you know.
Keep in mind this is an oversimplified explanation of how electricity works. Sometimes analogies end up complicating things up instead of working as crutches. For instance, people often assume electrons = electricity, but you CAN and DO have electricity WITHOUT electrons (see: certain types of batteries). All you really need is a non-neutral particle to use as an electromagnetic carrier. In essence: electricity = electric field + magnetic field. If you really want to grasp how electricity works, and if you don't have a deep understanding of higher level mathematics, I seriously recommend you read "A VISUAL TOUR OF CLASSICAL ELECTROMAGNETISM" (just google it. It's pretty much the first link) by MIT. It pretty much explains how electricity actually works alongside a couple of equations. But even that interpretation doesn't tell the whole story. Electricity is actually quite complex when getting into the nitty-gritty. Also, "static electricity" isn't really static. Fucking jargon end up complicating things even further.
I really like this guy. I first watched him when discussing the three general types of sound equipment (i.e. subwoofers); he popped up in my YT feed for this video, so I thought it might be a great video. It is. He’s funny, explains the material well, and it’s actually educational for general topics. I sure hope he is around still, given this video is 7 years old.
Great Video. Manually working out Consumption Calculating the energy cost of an appliance or electronic device is fairly easy. Most devices have a label that lists how many watts it uses, either on the device or in the owner's manual. You will need to find this number to figure out how much the appliance is costing you. You will also need to estimate how many hours a day you use a particular appliance. The Wattage Label If you can't find the wattage label, there are other options to determine how much power your device uses. For example, you can purchase a wattage measuring device, such as the Kill A Watt®. Simply plug your appliance or electronic device into the Kill A Watt® to determine how much power it uses. Or you can contact the manufacturer, with your model number, to find out how many watts a particular device consumes. You can also check the list at the bottom of the page for common wattage on household devices. Though your particular device may vary, it should give you a rough estimate of the energy expenses related to the device. Calculate Electricity Consumption - 4 Easy Steps Step 01 Watts Per Day To calculate energy consumption costs, simply multiply the unit's wattage by the number of hours you use it to find the number of watt-hours consumed each day. For example, let's say you use a 125 watt television for three hours per day. By multiplying the wattage by the number of hours used per day, we find that you are using 375 watt-hours per day. 125 watts X 3 hours = 375 watt-hours per day Step 02 Convert to Kilowatts Electricity is measure in kilowatt hours on your electricity bill. Since we know that 1 kilowatt is equal to 1,000 watts, calculating how many kWh a particular device uses is as easy as dividing by 1,000. 375 watt-hours per day / 1000 = 0.375 kWh per day Step 03 Usage Over a Month Period Now to find out how much that's actually going to cost you on your electric bill, you'll have to take the equation a bit further. First you'll need to figure out how many kWh the TV uses per month. 375 watt-hours per day X 30 days = 11.25 kWh per month Step 04 Figuring Out the Cost Next, pull out your last electric bill and see how much you pay per kWh. For this example, let's say you pay 10 cents per kilowatt hour. To find how much the TV is costing you in a month, multiply your electricity rate by the kWh per month that you calculated above. 11.25 kWh per month X 0.10 per kWh = 1.13 per month Another Example Here's another more costly example: Your refrigerator runs 24 hours a day. Most refrigerators consume 300-780 watts of electricity. Let's assume you bought a model that uses only 300 watts. 300 watts X 24 hours = 7,200 watt-hours per day 7,200 watt-hours per day / 1000 = 7.2 kWh per day 7.2 kWh per day X 30 days = 216 kWh per month 216 kWh per month x 0.10 per kWh = 21.60 per month Common Wattages for Household Appliances The wattage on appliances or electronics varies by device. Typically, older model appliances use more energy, but newer models tend to be more efficient. You can also purchase ENERGY STAR appliances, which are among the most efficient appliances. According to the EPA, here's a list of typical wattage levels for your everyday devices. Coffee maker 900-1200 watts Microwave 750-1100 watts Toaster 800-1400 watts Dishwasher 1200-2400 watts Washer 350-500 watts Dryer 1800-5000 watts Iron 100-1800 watts Ceiling fan 65-175 watts Space heater (40gal) 4500-5500 watts Hair dryer 1200-1875 watts Laptop 50 watts Computer monitor 150 watts Computer tower 120 watts Television 19"-36" 65-133 watts Television 53"-61" 170 watts Hope this Helped if it did would you mind maybe viewing my channel and just leave a like or subscribe for a few days. I really like video's like these.
perhaps you could do a video expounding on the subtle differences between what the VA and W ratings on PDU’s, USP’s, etc and the implications they have on switching power supplies commonly used with said power distribution devices.
Thanks a ton, I was having a hard time wrapping my head around some of these terms and there's so many it can be confusing as to which means what but you were able to explain it in a way I could picture better
Another unit is resistance measured in ohms. If you multiply resistance by current you get the voltage so if you multiply the current squared by the resistance to get power.
Hair dryer bought in monaco would not work nice if you plug it in New York but I'm sure it will not blue smoke. In monaco the voltage is 230V and it's 110V in New York I think.
An appliance only draws as much current as possible. In this case, since the hair dryer is basically a resistive load, only so much current can flow at a voltage, and since 110V is less than 220V, there is less current flowing.
Thank You for these videos! I work in HVAC as a helper and I'm trying to learn use of multimeter. For detecting/trouble shoot any type of trouble such as electic motor problems, capacitors, transformers and contactors. I want to learn and have a clearing understanding of testing volts, amps, hertz, and contiuity etc. This is all very confusing, and where to start and or comprehend. I just don't know what to look for. Please help????????????
it's more of a science unit of measurement rather than something you use in every day life to describe stuff like miles per hour. I guess you could substitute calories for joules in food, but that would just be change for the sake of change
@@HearMeLearn That's a fair point. the way measurement systems are done today it'll just be change for the sake of change and we get enough of that with software UI changes.
i'm building a small heated paint storage room in an unheated garage. Think of a space 4x8 x 9' tall with some shelves, and a door, insulated walls. I want to install a heater. Oil Filled electric space heaters run at 120 volts, consume up to 1500 watts, and put off a set amount of BTU's. There are also 4 foot electric base board heaters, that lack the thermal mass of the oil filled electric radiator style that come in 120 and 240 volts. I found your video as I searched for information on "higher voltages, consume lower amps, and are cheaper to run." But with electric heat, I got the impression that a watt of energy in, regardless of whether its 1 leg at 120 or 2 leg at 240, will produce the same BTU's. And instead of drawing 15 amps on one leg, I'd just be drawing 7.5 amps on two legs, and thus wind up with the same bill from the electric company at the end of the month, and I have to give up the thermal mass of the oil filled radiator if I go to 240. BUT, i have the sense i'm missing something. Can you go more into depth on how this works with AC voltage, and amperage, and how that relates to creating BTU's with electric heat, and the Kilowatt Hour Draw and expense? I love the geeky math stuff. Thanks!!
Because their power grid was constructed when the current war was still ongoing. basically a punch of guys arguing what would be better- high voltage, low voltage, DC, slow AC, fast AC..... In some parts of new York they had DC supply even to this century. In europe electricity spread a bit later, so they had a lot more information and decided for 50 Hz and around 230 Volts.
Dynamical In europe it took far longer for electricity to really spread widely, and at tthere a group of engineers decided that 50Hz/120 Volts would be more suitable. At the end of WW2 the infrastructure was run down, and to increase efficiency of the whole system they rampd it up to 230 V. Now at that time electricity and the tools to use it have already spread in the US. and while they initially wanted to change the system, the costs and hassles of a change were thought to be too big, so they stuck.
Remembering the fundamental types of quantities is key! Watts are a quantity of power: energy/time. So, a watt-hour or kilowatt-hour is power • time, which simplifies to a quantity of energy. Amps are a quantity of current: charge/time. So, an amp-hour or milliamp-hour is current • time, which simplifies to a quantity of charge. To be more precise, you can consider the actual units of watts (W), joules (J), amps (A), coulombs (C), and seconds (s). 1 W = 1 J/s, 1 A = 1 C/s.
So basically, (I am a beginner just starting to do simple electronics with breadboards btw), Volts are the pressure/force in which the electricity is pushed, Amps measure the speed of electricity flowing, and watts is the measure of the electricity itself? Just trying to make sure and not be confused, thank you for the explanation btw, great analogies and comparisons compared to other videos I've tried.
kWh is not really explained well. It is the ACTIVE energy that is 'used'. The reactive energy is not accounted in this. This is measured in VAR, not in kWh.
You also made a mistake, saying that batteries have a capacity. They don't. This word is very misused. The right word is electric charge. Capacity is in F, electric charge in Ah or C (actually As)
Moment is something else, for example, you've got a rock with a long stick balancing on it, it is 2 meters long, so 1 meter both directions, if you would apply 100 newtons of force on the left part, it would mean that the stick has 100Newtonmeter (newton times length in meter) to the left, this way you can calculate something like, how much force do i need to apply if i apply the force 0,25meters away from the rotationpoint on the right side. for example: (N=Newton, m=meters, Nm= Newtonmeter) 100N*1m=100Nm 100Nm/0,25m=400N --> 400N*0,25m=100Nm prntscr.com/cyyhin (visualised)
One thing I dont understand in American electronics... Why they prefer 120v rather than 230v (or higher) low voltage means higher amps and then the cable has to be alot thicker, and powerloss is much higher at long range use. Someone smarter explain to me
120v is just what we get from the tap. The long-distance power lines (the ones suspended on metal towers) can reach 11kv, and is down-stepped to 120v as it approaches its destination.
That's both true and untrue. Voltage is the "pressure", so high voltage allows current to flow through a human. 1 volt might not conduct through the skin. 10,000 certainly will. However, it's not the voltage that stops your heart, but rather the current. 0.1 amps is all it takes to stop your heart. This is caused by the current causing the heart the contract as the signals that tell our muscles to move are electrical. This kills you. Above 0.2 amps and you might potentially live because it's actually so intense it doesn't get the chance to mess up the fibers of your heart when it contracts because the contraction is so severe. You might stop breathing and will become unconscious, but will be able to be resuscitated if acted upon quickly. However, severe enough burns from high currents may kill you instantaneously. For example, the infamous third rail of Chicago's "L" trains, has such high current, that it actually cooks you from the inside out in a matter of seconds. In fact, if European homes are 5 amps instead of 10, you won't suffer as severe a burn.
+SpecialJ11 I don't know if what you're saying really is true though it's kind of close to the truth. +Ville Pyykönen I'm pretty sure 120V vs. 230V is just a historical thing and it's hard to change any more. 120V is almost harmless to humans so it has that going for it. 230V though needs smaller cables etc you mentioned.
I watch this video every 3 months, just to make sure i don’t forget the topic.
It's been 3 months, have you watched it again?
@@gargonio4295 😠 my reminder was set for this weekend.
Its been 5 months have you watched it?
@@ludadoyt8317
I watched it instead of him
@@anasusz3815 very good
I think this explanation is a bit over-complicated... but can I do better? Here goes.
Volts (voltage) is kinda like water pressure.
Amps (current) is like how much water is flowing. Think current, as in the current flowing in a river.
Just like water, if there is no pressure, then the water won't flow.
If there is more _resistance_ (say, a river with many twists and turns, or a narrow water pipe), it will take more pressure to make the water flow. This is just the same as electrical resistance (which is measured in _ohms_).
Usually, if you have a source of electricity, it will be supplied at a certain voltage. Say, 120V or 240V. This voltage normally doesn't change much, regardless of what you plug in.
Depending on the _resistance_ of what you connect to it, a certain _current_ will flow. When you have both _voltage and current_, power is used. Power is measured in _watts_.
If you don't have anything plugged in, that is (more or less) a resistance of infinity. No current will flow. As you might guess, there is no power used.
If you short circuit your electricity supply, that's a very low resistance. Plenty of current will flow. Lots of power is used!
To carry lots of current, you will need thick copper in your wire. The electrons flow in the copper, so you need a thicker "pipe" if there is more flow.
If your supply is a high voltage, you will need thicker plastic insulation around the copper. Just like you need a thick walled pipe to keep lots of pressure from bursting out.
Perhaps you have a heater, which is 1,200 watts, or, 1.2 kilo-watts (kW). This is how much power it will use.
Of course, your electricity bill will be higher if you have your heater switched on for longer. If you run it for 10 hours, you will have used 10 times as much energy as if you ran it for 1 hour.
This is why energy is measured in kilowatt-hours (kWh). That is, the number of kilowatts of power used, multiplied by the number of hours it was used for. Running your 1.2 kW heater for 10 hours will consume 12 kWh.
The expression "kilowatts per hour" does not make any sense (unless there is something very, very special going on!).
Batteries are slightly unusual, as they are measured in how much current they can provide, for a certain amount of time. This is because of chemical reasons. So, your battery may be able to provide 2 amps for an hour. This is a 2 amp-hour battery.
If the battery voltage remained exactly the same, this would equate to a certain amount of kilowatt-hours, but sadly the battery voltage drops somewhat as it runs flat. This makes it more complicated, so amp-hours is the preferred unit of measure.
Now for some maths:
Voltage = Current x Resistance (V = I x R)
Power = Voltage x Current (P = V x I)
An example - your 120V, 1.2kW heater.
How much current is flowing? Put those numbers into the second equation.
P = V x I
1,200 = 120 x I
I = 10 amps. Easy!
What resistance is your heater? Put the numbers into the first equation.
V = I x R
120 = 10 x R
R = 12 ohms.
Let's plug your heater into 240V instead! How much current would it draw?
V = I x R
240 = I x 12
I = 20 amps. Twice as much!
How much power?
P = V x I
P = 240 x 20
P = 4,800 watts! That's four times as much! This may be a surprise. Your heater will certainly blow up.
Did I do better at explaining it? Please let me know!
Better thanks
This is noted. I will place this on my notes, really.
Godfrey Poon so current will be = how much electrons are flowing
+Yuvraj Dhruw Exactly.
Godfrey Poon Omg thanks I finally got it
as someone who failed chemistry, this answered about 4 questions and raised about 16
That is called learning. You didn't fail chemistry, your instructor failed to teach it so that you can understand it. If you retry chemistry today, I bet it will make more sense. Some things do not take hold in our youth. Retain enough learning and master it and you get to call it wisdom. Then you should dispense it, because it will do you no good to take it to your grave.
Thomas T He failed. He skipped class to go smoke weed with his little stoner buddies. I’ll give you the benefit of the doubt and say you are optimistic but you are also naive. Let this be a lesson to you. Don’t always assume the best.
MrL you’re an idiot 😂
@@thomast8539 This is a great quote, did you come up with this? If so, write a book on philosophy ASAP. TY
...wait isn't this physics?
As someone who is in the process of becoming a science teacher. This is one of those videos that will be saved and used in classes later on.
Hey...I wish you well and hope you enjoy your future endeavors. It is largely a thankless job, but great teachers (which is what I think you'll be due to your concern and purpose well before it's becoming a reality) are what help develop children with less than stellar parenting into upstanding citizens in the future. I just hope some of these strange political stuff is toned down in the classrooms, especially for the youngsters.
One misconception I'd correct here is thinking of the cell (or battery) as a reservoir of electrons ready to flow from negative to positive. It's not that. It's more like a pump, which pushes the electrons that are already in the wires and components around. The model I use is to have students hold a loop of rope, and one of them pulls the rope through their hands. That person is just a pump - they don't have a big reel of rope in their pocket.
I wish my science teacher played this video
My light just turned on for the first time. I'm married to an electrician and this is the best I have ever heard. Now I can talk like him and I want my EFI plugs back and a sine wave power control to hook up my telescope and computer. Im sure you get this. No more watts for me . I need to see my currents at play and know if I'm rated in all areas to safely protect my 6,000. Equipment. Your the best.
As an Electrical Engineer, great job! Would've been so much easier to understand this concept with this video many many years ago
thought it flowed from positive to negative. not negative to positive.
@@ortegajones4929 positive to negative is what's called "conventional current", which was the original theory of how electricity flows. This was later discovered to not be true (it flows from negative to positive), but many people still teach and use conventional current for circuits and such, mostly because it was already pretty well established and would be hard to change
@@アヒル総統 I did research it right after but thanks for the attention :). Considering electrons are negative I don't know why I missed that.
@@アヒル総統 Yeah, now, I am being taught that current flows from POSITIVE to NEGATIVE. Electrons flow from NEGATIVE to POSITIVE.
@@ortegajones4929 amazing how you couldn't accept being viewed as ignorant.. your reply is more embarrassing than the idea of you ignoring that electricity fact.
I can control the brightness of the light in my fridge depending on what setting my oven is running at... which is nice
ROFLMAO
Wtf Doofenshmirtz
@@mamad7976 hahahahahahahahhahahah I just woke up and watched this and read this. Watt a morning already.
Haha hah hahaha haha ya that must be nice!
Does it RGB?
Volts=Caliber
Amps=Firerate
Watts=DPS
AH=Magazine
WH=Total damage
BLOOGaming tl;dr
very helpful!!
Not the whole story. Higher voltage also causes higher current unless there is higher resistance.
@@dragongempeltus0122 uuuc
Resistance=thiccer flesh
Linus I've been following your channel for a while. I've watched many youtube channels trying to understand the concepts of voltage and amps. Some of them even used the water analogy. I almost gave up trying, until I saw your video. There's something about hearing it from the right person that makes it click on a persons brain. Thank you so much!
*You just taught me in 4 minutes and 12 seconds what my idiotic "Science Teacher" in high school couldn't in several YEARS.* I DON'T CARE about the equations, I DON'T CARE about the graphs. I CARE ABOUT PRACTICAL APPLICATIONS. If he couldn't understand *that* then he didn't belong in the teaching profession AT ALL. Do those other things matter? I'm sure they do! But they are MEANINGLESS without exactly what *you* just explained here being taught FIRST! I'm guessing I'm hardly the only one who failed science in high school *because my high school science "teacher" FAILED ME.* Bravo to you!!! YOU DESERVE A MEDAL!!!
Been in school for 22 years and this is - by far - the best explanation of volts vs amps that I have heard. Thank you.
22 years ?
Bruh wtf is your major?
What the fuck are you talking about it's so you saying you went through high school two times first grade the fucking 12 twice damn bitch you crazy
Did you reset 3rd grade 5 times and then reset middle school twice?
It’s simple if you just picture a river flowing. Very basic electrical knowledge that everyone should know
Never thought I’d end up on a Linus video when trying to understand my uni coursework xD
Me rn
That last bit though. First time I've ever seen an off-shoot in a techquickie. And it was GOLDEN!
everyone is discussing whether or not well explained, and I was just looking for someone like me how enjoy the off-shoot in this video thanks Carsten Svendsen
And it had an Americaball!
Carsten Svendsen there were more ;p
Carsten Svendsen Awesome!!!
I am about 30 years old,
This is the first time i am coming across a person who has explained these units in such simple terms.
I wish i had seen this in my school days.
Better late than never
In physics terms:
Electricity is measured in units of charge
Voltage(V)=how much energy per charge
Amp(I)=how much charge per time
Wattage(P)=how much energy per time
Therefore P=V×I
Imagine electrons as trucks carrying energy.
High voltage means each truck carries a lot of energy.
High ampere count (current) means many truck passes through.
wait, so US also uses kilowatt hours? But.. but that's dirty metric system! I thought they have something like 3 arm lengths of electricity, or something along those lines, they used to measure things in body parts.
One shock = the amount of electricity needed to kill a 240-lb. person
@@infinitasalo472 0.05A AKA 50mA Is enough to kill someone
Well, a kilowatt-hour is just the same thing as a joule, so it's still stupid
Feet and mile were first used by the British many fortnights ago, you european Sap.
Metric is better than you're stinky feet smelling Imperial system Canada all the way!!
The reason why it is called KiloWattHours, is because when you multiply two things together you will have to multiply the units as well, like how you do with the area, 10m * 5m = 50m^2. So if your device is running 1k Watt (per hour), and you used it for 24 hours. 1k Watt * 24 h = 24kWatt * h. That is why we have to keep the hour included, else you wouldnt have known whether that number is your total usage or just a usage on a specific period. Hope it helps
I know this comment is 4 years old, but I think I'm either still slightly confused, or *maybe* I understand what you're saying. So originally (after watching the video) I was thinking a "Oh, so a kWh is the average amount of kilowatts you're using per hour over the course of a given period of time." (in the case of an electric bill: 1 month). However after reading your comment it sounds like I was woefully off the mark. -_-
Linus had also mentioned that "Light Years: Not Time", and while he's technically correct (Light Years are a measure of distance), it's also not wrong to consider it in the context of time (i.e. "If I were moving at the speed of light, it would take me this many years to travel from Point A to Point B"). Using this mental framework when trying to understand your comment, are you saying that a Kilowatt-hour is actually summarizing "If you were continuously and precisely using 1 Kilowatt of power per hour [during this billing cycle] this is how many hours total you would have been running your power"?
@@OfficialCharcuterie Let's take some concrete examples. For a total of 24kWh to be used, one could either use 1kW for 24 hours, 24kW for 1 hour, 12kW for 2 hours, or any combination of factors that multiply into 24. In this particular case, there are only 2 factors--one being power (watts / kilowatts) and the second being the duration for which it is used (hours).
A kilowatt-hour is not a summary of what you mention in your comment. Rather, in this context, it is simply a unit of total energy consumption. However, since [kW x h] = kWh, knowing any two values in the equation will allow you to easily calculate for the third. Hope this helps
great scotts!
@@shootinbruin3614 Aha! Okay - very much, yes! Having it expressed in terms of "an equation with known and unknown variables" was incredibly helpful. Thank you!
@@OfficialCharcuterie Glad I could help!
My teachers did a poor job to get me interested in stuff i guess. Thank you Linus , Guru.
I have watched a few videos on this subject and was always confused. This finally cleared it up.
One more analogy incase someone needs it.
If you think of a can of hairspray, volts would be the pressure in the can
If you press the nozzle down, the amps(current) would be the measure of how fast the hair spray comes out
Watts would be a measure of how much hairspray was used in total
thank you!
This is great!
7 years later, this is really useful. Had to watch it twice lol. Thank you so much!
This taught me more then my 9 week electrical course
your electrical course must've been exceptionally bad.
@Rio Pruitt I think it's like that in all trades or jobs you go to school for. They push so much info out at you in college or trade school and you forget a lot of it by the next semester. You'll eventually get it on the job like most things. People will still be showing you and teaching you if you have questions about something and eventually it will all make sense. I still have a hard time with all this in welding and get it so confused still on my welding machine. I know how to weld, but it helps if you know exactly what voltage and amps does cause then you can tweak it just right to make a perfect weld. Something else I haven't got yet and I don't think anyone in my college did was blueprint reading. I think one reason is because our first teacher never really taught it and in the second class he gave us blueprints that seemed really advanced to learn from. They were like huge pages with many parts and about 7 pages to each one. It was overwhelming. They push each thing you learn so fast that it still doesn't make much sense by the end. Knowing about half or more than half of it is better than knowing none of it. It makes it easier to learn on the job.
You must not pay attention at allå
Great video guys! I find this concept is extremely difficult to explain to people who aren't engineers (like me). Based on the way you explained it, this will be the first video I recommend to anyone wanting to learn more
Monaco runs on 230V, New York runs on 110V → definitely no blue smoke, it will just run very slowly (if at all).
It will run just fine, it will just use more amps
@@paulopereira47 That is not how hair dryers work.
hellterminator not really how most electronics works anyways iirc.
@@dryagedmilk It kinda is, actually. A lot of electronic devices these days have switching supplies which can accommodate a wide variety of input voltages and will always draw the same power (allowing small differences due to conversion efficiency). So for something like a computer, he's right - it would “just use more amps.”
ruined it
Why did my teachers not explain all those units and relationship between them like this man.... Genius analogy explanation. Finally understood this after 13 years during 5 minutes...
Second rate youtubers? You guys explains thing thats complicates me for years much more simpler and yet thoroughly than my instructor..great job!
I love that you made me smile while learning! That’s the best way for me personally to retain things. Connecting humor and lightheartedness with practical application is a clever and effective way to teach. Well done!
Thx Linus as always you seem to have a natural way of explaining things. Now i can move on to more advanced subject matter.
...but the voltage in Monaco is 230V, and in New York it's 120V, so if you plug in that hairdryer in NY it will run at half the voltage, so it' won't explode, but will blow air at a slower speed... which you explain when you compare Power and Amperage. Blame the editor
thought i was the only one that noticed this. the other way around and it would have been right tho :)
But 110V sucks. #EuropeRocks
Interestingly, to run a 1000W US hair drier (110V) you require double the current that is required for 1000W European (230V) hair drier, which explains why the cabling is a lot thicker on US goods, as the cable needs to be able to carry the higher current. Power = Voltage x Current
Im mexicancholo but I side with the viet cong and I have one of those rice hats
And I also consider myself a ricer
You confused me even more because now I have your explanation and my teacher's explationation. Both going crazy in my head
My hose has a jet setting. The water shoots out super fast, which feels like it's actually spraying more water. In reality, my plumbing can only push so much water out, and that volume is already maximized with the open hose. So, it doesn't fill a bucket any faster if I use the jet or not.
When I use the jet nozzle it increases the PSI (volts) by decreasing the nozzle diameter (amps), but in the end it's still spraying the same amount of water (watts).
For those wondering: a kilowatthour is 3.6 megajoules and a milliamphour is 3.6 coulomb. When dealing with AC the whole deal gets a little more complicated but it's a similar idea.
That ending is fucking golden
10/10 holy shit
The water gun vs hose analogy to explain power was great. Thanks
i understood more from this than 20 videos taught by teachers. thank you guys like geniuenly.
I'm a 7 out of 10 on the "Smart Person Scale". I've struggled for years to understand WATT you explained in minutes. Thank you. You're awesome!
I've always imagined electricity as traffic on roads or highways. Voltage being the speed on the highways and amperage being the traffic. I guess wattage in this analogy would be traffic per hour at a given speed and amount of traffic.
Amperage is measured in time, (electrons passing per second) so you shouldn't think of voltage as the speed of traffic because it would imply that the more volts, the more traffic is moving past a given point per second.
Think of volts as "pressure" or "muscle".
Remember, volts are being created by some sort of physical "muscle" or turbine that physically moves to "push" the electrons forward.
In the traffic analogy, you can think of volts as the physical horsepower of the cars on the road.
So if the traffic maintained the same speed and there were the same number of vehicles, but suddenly all the vehicles turned into tow trucks, the voltage (horsepower) would increase while the amperage (number of vehicles per second) would remain the same.
Traffic is easily the best explanation.
no, water in a pipe is easily the best explanation. the different terms and concepts match up really well.
water pressure = voltage (volts)
size of the pipe = resistance (ohms)
how much water flows through the pipe (voltage/resistance) = current (amperes)
how much water flows * how much pressure it took to move it (current*voltage) = work or power (watts)
gallons of water per unit time = amount of energy used or contained (watt-hours or amp-hours)
@@dialecticalmonist3405 volts is like the amount and amps is the strength
@@thinkdunson thank you for keeping it simple
This one finally cleared up my confusion. Great video LMG.
the best self-deprecating humor, you just don't see it coming, hilarious!
Explained nicely. Love the Serenity on the back of the door at 6:01!
Thank you for this video.
I’m not an engineer or electrician or whatever, but I can (and do) basic DIY wiring around the house. I’ve watched many UA-cam videos to learn how to do this safely, but never been able to figure out why. Why are breakers/wires in amps? Why is my power bill in KWh.
Finally....I understand what it all means.
Clean, precise and using imagery which hits it home! Well done sir!
:) I'm studying for an architectural licensing exam and this made it that much more enjoyable. Thanks for the fun and educational video :D
Holy shit, not the tunnelbear ad sellout 😱 what a throwback
Wow this answered so many questions!!! Studying solar power batteries and voltage with amps and everything I am usually left with more questions than answers! This is probably one of the first videos I have ever watched or I did not feel like I was left with more questions! Thank you so much and please teach me more!
3:30 that water wheel is spinning the wrong way
Its an illusion nvrmind
Due to fps and pixel persistence it can be seen as spinning both ways.
Actually for me the inner wheel spins clockwise and the outer anticlockwise.
Try it with different video speeds.
+bastard™ wtf mam
+bastard™ I AM AT SCHOOL
+Michael Mendieta I see what you mean. Interesting
Linus, european is 230 Volts. Trust me, I'm an engineer. I always wanted to be able to say that.
Xiefux That's true I guess. Better than what I said.
not necessarily , where i live it's 220 Volts.
I saw it kind of varies between 220 and 240 depending on the country.
It's officially standardised at 230, but with large tolerances so countries using 220 or 240 can stay at those voltages but still be compliant with the standard..
that the official value, and you should know that homes are very often not that high, or sometimes are higher!
Sean Anderson If you're talking to me, for god's sake people, I just took an opportunity to say something. Take a chill pill. This isn't how you make friends you know.
I still don't get it.
nfaguade Me neither. This shit is hard.
yeah, maybe we need to watch it several times,
Keep in mind this is an oversimplified explanation of how electricity works. Sometimes analogies end up complicating things up instead of working as crutches. For instance, people often assume electrons = electricity, but you CAN and DO have electricity WITHOUT electrons (see: certain types of batteries). All you really need is a non-neutral particle to use as an electromagnetic carrier. In essence: electricity = electric field + magnetic field.
If you really want to grasp how electricity works, and if you don't have a deep understanding of higher level mathematics, I seriously recommend you read "A VISUAL TOUR OF CLASSICAL ELECTROMAGNETISM" (just google it. It's pretty much the first link) by MIT. It pretty much explains how electricity actually works alongside a couple of equations. But even that interpretation doesn't tell the whole story. Electricity is actually quite complex when getting into the nitty-gritty.
Also, "static electricity" isn't really static. Fucking jargon end up complicating things even further.
+m8onethousand you may want to edit that, you said crotches, instead of crutches.
+m8onethousand you may want to edit that, you said crotches, instead of crutches.
Concise and simple analogies are used to understand. I just wish more videos were like this!
I really like this guy. I first watched him when discussing the three general types of sound equipment (i.e. subwoofers); he popped up in my YT feed for this video, so I thought it might be a great video. It is. He’s funny, explains the material well, and it’s actually educational for general topics. I sure hope he is around still, given this video is 7 years old.
He is! Main channel is Linus Tech Tips :)
@@TeddieBean Oh, awesome! Thank you!
Great Video.
Manually working out Consumption
Calculating the energy cost of an appliance or electronic device is fairly easy. Most devices have a label that lists how many watts it uses, either on the device or in the owner's manual. You will need to find this number to figure out how much the appliance is costing you. You will also need to estimate how many hours a day you use a particular appliance.
The Wattage Label
If you can't find the wattage label, there are other options to determine how much power your device uses. For example, you can purchase a wattage measuring device, such as the Kill A Watt®. Simply plug your appliance or electronic device into the Kill A Watt® to determine how much power it uses. Or you can contact the manufacturer, with your model number, to find out how many watts a particular device consumes. You can also check the list at the bottom of the page for common wattage on household devices. Though your particular device may vary, it should give you a rough estimate of the energy expenses related to the device.
Calculate Electricity Consumption - 4 Easy Steps
Step 01 Watts Per Day
To calculate energy consumption costs, simply multiply the unit's wattage by the number of hours you use it to find the number of watt-hours consumed each day. For example, let's say you use a 125 watt television for three hours per day. By multiplying the wattage by the number of hours used per day, we find that you are using 375 watt-hours per day.
125 watts X 3 hours = 375 watt-hours per day
Step 02 Convert to Kilowatts
Electricity is measure in kilowatt hours on your electricity bill. Since we know that 1 kilowatt is equal to 1,000 watts, calculating how many kWh a particular device uses is as easy as dividing by 1,000.
375 watt-hours per day / 1000 = 0.375 kWh per day
Step 03 Usage Over a Month Period
Now to find out how much that's actually going to cost you on your electric bill, you'll have to take the equation a bit further. First you'll need to figure out how many kWh the TV uses per month.
375 watt-hours per day X 30 days = 11.25 kWh per month
Step 04 Figuring Out the Cost
Next, pull out your last electric bill and see how much you pay per kWh. For this example, let's say you pay 10 cents per kilowatt hour. To find how much the TV is costing you in a month, multiply your electricity rate by the kWh per month that you calculated above.
11.25 kWh per month X 0.10 per kWh = 1.13 per month
Another Example
Here's another more costly example: Your refrigerator runs 24 hours a day. Most refrigerators consume 300-780 watts of electricity. Let's assume you bought a model that uses only 300 watts.
300 watts X 24 hours = 7,200 watt-hours per day
7,200 watt-hours per day / 1000 = 7.2 kWh per day
7.2 kWh per day X 30 days = 216 kWh per month
216 kWh per month x 0.10 per kWh = 21.60 per month
Common Wattages for Household Appliances
The wattage on appliances or electronics varies by device. Typically, older model appliances use more energy, but newer models tend to be more efficient. You can also purchase ENERGY STAR appliances, which are among the most efficient appliances. According to the EPA, here's a list of typical wattage levels for your everyday devices.
Coffee maker 900-1200 watts
Microwave 750-1100 watts
Toaster 800-1400 watts
Dishwasher 1200-2400 watts
Washer 350-500 watts
Dryer 1800-5000 watts
Iron 100-1800 watts
Ceiling fan 65-175 watts
Space heater (40gal) 4500-5500 watts
Hair dryer 1200-1875 watts
Laptop 50 watts
Computer monitor 150 watts
Computer tower 120 watts
Television 19"-36" 65-133 watts
Television 53"-61" 170 watts
Hope this Helped if it did would you mind maybe viewing my channel and just leave a like or subscribe for a few days. I really like video's like these.
perhaps you could do a video expounding on the subtle differences between what the VA and W ratings on PDU’s, USP’s, etc and the implications they have on switching power supplies commonly used with said power distribution devices.
just one day after my electricity test linus posts this
6 years later and I’m here. Thanks for always helping Linus
Keep coming back to this every once in a while...
2:35 Every time he said "water" after this, this was the only thing I could think of. "Wat-er" "wat-er pistol"
haha same here i kept laughing uncontrollably for the rest of the video...definitely one of Linus's funnier videos. oh and hi from the future.
First time ive ever slowed the playback speed
Why did you slowed the playback speed?
@@hakaishin4314 someone have to really understand shits on his life
I did the same and now im distracted at how funny it he sounds.
4:46 best voice crack in years
you are right sir
funny
Watching you for years. you are doing great work!
got a chemistry test on friday, you explained this better then my teacher :D
Thanks a ton, I was having a hard time wrapping my head around some of these terms and there's so many it can be confusing as to which means what but you were able to explain it in a way I could picture better
Nice little ending there, dammit John.
I think this is the third time I've watched this, and the second time I went to place it into favorites only to find it had already been placed there
You’re actually really good at explaining shit. Felt like you were talking to me like I’m stupid and I am and it helped👍
Another unit is resistance measured in ohms. If you multiply resistance by current you get the voltage so if you multiply the current squared by the resistance to get power.
Watt is love, baby don't Hertz me, no Morse
Go ohm you're drunk
Too much reactance
Yes, but what are the ants reacting to?@@bixbyfamily5682
y
hahaa excellent!
Hair dryer bought in monaco would not work nice if you plug it in New York but I'm sure it will not blue smoke. In monaco the voltage is 230V and it's 110V in New York I think.
You're right. It just won't work, or work poorly.
No, the amperage is different. 5 Amps vs 10 Amps.
And? As long as the wall is able to deliver it, you won't have problem. It's like a computer : it takes just the current that it needs
L3xou97 doesn't extra current fry electronics if they don't have a fuse or circuit breaker?
An appliance only draws as much current as possible. In this case, since the hair dryer is basically a resistive load, only so much current can flow at a voltage, and since 110V is less than 220V, there is less current flowing.
3:51 What kind of keyboard is that??? That thing is gorgeous!
Type - x ( Type Writer) 😂
As a electrical engineering student, Linus explanation is way better than our Doctor
From his w=v×i days to his taycan ones, it's been electrifying to watch Linus go through adolescence. Keep up the great content 👍🏼
Not gonna lie, this was hella confusing ahaha 😂. So many analogies, I just wanted to know what each thing actual represents.
As an engineer, I feel like it's the simplest way. The water pipe vs electrical wire analysis is the simplest way to visualize it.
Very well explained. Thank you for this! 1 years since I did electronics at school and had forgotten :)
Miss the days when Linus spoke much faster, saving time.
GO to setting and make the speed 1.5x you'll save tons of time
MrAvatin wow I've never thought of that, honestly thank you.
Set your thinking to 1.5x and you'll think of it next time.
As a mechanical engineering graduate that not practicing, I need this video to refresh regularly.
im an electrical engineer, and i dont know how i managed to do it. But now im learning things here
Thank You for these videos!
I work in HVAC as a helper and I'm trying to learn use of multimeter. For detecting/trouble shoot any type of trouble such as electic motor problems, capacitors, transformers and contactors.
I want to learn and have a clearing understanding of testing volts, amps, hertz, and contiuity etc.
This is all very confusing, and where to start and or comprehend. I just don't know what to look for.
Please help????????????
Me too! Got any answers yet? Please respond 🙏 👊
so milliamp hours is pretty much like a fuel gauge telling you the total amount of energy inside of a full battery/cell? thanks!
Yes
It's too bad joules aren't used more often. They feel like they should be more commonly used.
I'm sure joule find a way to use them more often
it's more of a science unit of measurement rather than something you use in every day life to describe stuff like miles per hour. I guess you could substitute calories for joules in food, but that would just be change for the sake of change
@@HearMeLearn That's a fair point. the way measurement systems are done today it'll just be change for the sake of change and we get enough of that with software UI changes.
that's why we use watt-hour instead of joules they both measure energy but i'm guessing joules is used more in physics than Electricity
Starting a new job as an electrician's helper next week... figured I should probably finally pay attention and figure these terms out.
i'm building a small heated paint storage room in an unheated garage. Think of a space 4x8 x 9' tall with some shelves, and a door, insulated walls. I want to install a heater. Oil Filled electric space heaters run at 120 volts, consume up to 1500 watts, and put off a set amount of BTU's. There are also 4 foot electric base board heaters, that lack the thermal mass of the oil filled electric radiator style that come in 120 and 240 volts. I found your video as I searched for information on "higher voltages, consume lower amps, and are cheaper to run." But with electric heat, I got the impression that a watt of energy in, regardless of whether its 1 leg at 120 or 2 leg at 240, will produce the same BTU's. And instead of drawing 15 amps on one leg, I'd just be drawing 7.5 amps on two legs, and thus wind up with the same bill from the electric company at the end of the month, and I have to give up the thermal mass of the oil filled radiator if I go to 240.
BUT, i have the sense i'm missing something. Can you go more into depth on how this works with AC voltage, and amperage, and how that relates to creating BTU's with electric heat, and the Kilowatt Hour Draw and expense? I love the geeky math stuff. Thanks!!
haha love these jokes with editors :)
3:33
"If we think of the hose and the water gun pushing out electricity, ..."
- Linus will be wet or electrocuted?!
Me making the same video, but only 3 seconds long: amperage x voltage = watt/h.
This man can explain more in 5 minutes than my science teacher in 5 years
to comprehend this better i have checked the 2 laws of "Ohm". However thanks a lot, that is the best video that explained the difference
1:27 "am i in the frame? am i in the frame? oh lets just use another footage" lol
lol
Error in the video --- America uses a 120 volt system not 110 volts. That changed decades ago.
I wonder how many people try to charge their phones in a bucket after this
Why does the USA have such low voltage?
Because their power grid was constructed when the current war was still ongoing.
basically a punch of guys arguing what would be better- high voltage, low voltage, DC, slow AC, fast AC.....
In some parts of new York they had DC supply even to this century.
In europe electricity spread a bit later, so they had a lot more information and decided for 50 Hz and around 230 Volts.
ABaumstumpf but wasn't Europe the first to make electricity?
Dynamical In europe it took far longer for electricity to really spread widely, and at tthere a group of engineers decided that 50Hz/120 Volts would be more suitable.
At the end of WW2 the infrastructure was run down, and to increase efficiency of the whole system they rampd it up to 230 V.
Now at that time electricity and the tools to use it have already spread in the US. and while they initially wanted to change the system, the costs and hassles of a change were thought to be too big, so they stuck.
Lots of countries do. Probably more than half. It's not just a USA thing.
The lower voltage is also safer. And the frequency is what it is. Motors turn faster, that's about it
Remembering the fundamental types of quantities is key!
Watts are a quantity of power: energy/time.
So, a watt-hour or kilowatt-hour is power • time, which simplifies to a quantity of energy.
Amps are a quantity of current: charge/time.
So, an amp-hour or milliamp-hour is current • time, which simplifies to a quantity of charge.
To be more precise, you can consider the actual units of watts (W), joules (J), amps (A), coulombs (C), and seconds (s).
1 W = 1 J/s,
1 A = 1 C/s.
So basically, (I am a beginner just starting to do simple electronics with breadboards btw), Volts are the pressure/force in which the electricity is pushed, Amps measure the speed of electricity flowing, and watts is the measure of the electricity itself? Just trying to make sure and not be confused, thank you for the explanation btw, great analogies and comparisons compared to other videos I've tried.
kWh is not really explained well. It is the ACTIVE energy that is 'used'. The reactive energy is not accounted in this. This is measured in VAR, not in kWh.
You also made a mistake, saying that batteries have a capacity. They don't. This word is very misused. The right word is electric charge.
Capacity is in F, electric charge in Ah or C (actually As)
This video only explains Direct Current. Alternating Current works way more different. This is really simplyfied.
What do you expected from a channel called "techquickie"?
@@Lambda_Ovine true. It's not even a real tech channel. EEvlog or electroboom are tech channels.
The definitions don't change so...
Linus: the new Bill Nye
Alan Stanley Bill Nye the Tech Guy
bill nye sucks
Much better than Bill Nye since Bill Nye is wrong so many times. 🤦♀️
I got 97% on my EE exam thanks to this video!
Very good explanation. Clearly explained using the illustration that helps easy to understand.
Wait, is a "moment" an actual unit?
Nope, there are turning moments but they are something else
unit for moments are usually Nm (Newton-Meters)
Moment is something else, for example, you've got a rock with a long stick balancing on it, it is 2 meters long, so 1 meter both directions, if you would apply 100 newtons of force on the left part, it would mean that the stick has 100Newtonmeter (newton times length in meter) to the left, this way you can calculate something like, how much force do i need to apply if i apply the force 0,25meters away from the rotationpoint on the right side.
for example:
(N=Newton, m=meters, Nm= Newtonmeter)
100N*1m=100Nm
100Nm/0,25m=400N --> 400N*0,25m=100Nm
prntscr.com/cyyhin (visualised)
Yes I know about the other moment but I'm asking about the 90-second one
momentum.
Oh Linus is explaining physics...lol
Yea without any numbers of ohm's law as one of his followers told me has nothing to do with computers
One thing I dont understand in American electronics... Why they prefer 120v rather than 230v (or higher) low voltage means higher amps and then the cable has to be alot thicker, and powerloss is much higher at long range use. Someone smarter explain to me
It's mainly because higher voltage is more dangerous.
Robbedem oh, of course :$
120v is just what we get from the tap. The long-distance power lines (the ones suspended on metal towers) can reach 11kv, and is down-stepped to 120v as it approaches its destination.
That's both true and untrue. Voltage is the "pressure", so high voltage allows current to flow through a human. 1 volt might not conduct through the skin. 10,000 certainly will. However, it's not the voltage that stops your heart, but rather the current. 0.1 amps is all it takes to stop your heart. This is caused by the current causing the heart the contract as the signals that tell our muscles to move are electrical. This kills you. Above 0.2 amps and you might potentially live because it's actually so intense it doesn't get the chance to mess up the fibers of your heart when it contracts because the contraction is so severe. You might stop breathing and will become unconscious, but will be able to be resuscitated if acted upon quickly. However, severe enough burns from high currents may kill you instantaneously. For example, the infamous third rail of Chicago's "L" trains, has such high current, that it actually cooks you from the inside out in a matter of seconds. In fact, if European homes are 5 amps instead of 10, you won't suffer as severe a burn.
+SpecialJ11 I don't know if what you're saying really is true though it's kind of close to the truth.
+Ville Pyykönen I'm pretty sure 120V vs. 230V is just a historical thing and it's hard to change any more. 120V is almost harmless to humans so it has that going for it. 230V though needs smaller cables etc you mentioned.
Hey thanks for having the electron flow going in the correct direction ;)
I thought electricity followed from positive to negative. This is why it's good to refresh ur knowledge with these videos