Faraday's Law of Electromagnetic Induction, Magnetic Flux & Induced EMF - Physics & Electromagnetism
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- Опубліковано 20 гру 2017
- This physics video tutorial provides a basic introduction into faraday's law of electromagnetic induction. It explains what it takes to induce a current in a second coil. A changing magnetic flux produces an induced emf in another coil. This video on electromagnetism contains an example problem with multiple parts that asks you to calculate the induced emf, the induced current, and the power dissipated by the resistor.
Magnetism - Review:
• Magnetism, Magnetic Fi...
Faraday's Law of Electromagnetic Induction:
• Faraday's Law of Elect...
Lenz's Law - Induced Current:
• Lenz's Law, Right Hand...
Induced EMF In Moving Conductor:
• Induced EMF In Moving ...
Electric Generators & Induced EMF:
• Electric Generators, I...
______________________________
Counter EMF of DC Motors:
• Back EMF & Counter EMF...
Transformers - Physics Problems:
• Transformers Physics P...
Mutual Inductance & Solenoids:
• Mutual Inductance & So...
Self-Inductance of Inductors & Coils:
• Self Inductance of Ind...
How To Make an Electromagnet:
• How To Make an Electro...
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Faraday's & Lenz's Law of Electromagnetic Induction:
• Faraday's & Lenz's Law...
Energy Stored In an Inductor:
• Energy Stored In an In...
RL Circuits - Inductors & Resistors:
• RL Circuits - Inductor...
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This man is singlehandedly keeping me passing my physics class
ON god bro. Doing my final project (12 page paper with a class demonstration that needs to be written up) right now, without this man id be fucked.
Can i ask a question? In the magnetic field, what does the u mean in uT for example the magnetic field is 4.23 uT?
@@angelikamaypardillo5612 uT means microTesla, and u means micro which is a prefix which makes the SI unit (in this case it’s Tesla) x10^-6 smaller
@@tomlawrence1498 4 months late but u got there!
Master Faraday's Law in just 12 minutes for FREE!!!
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My physics exam is in an hour and you just changed my mark. Thank you sir
Armin Buijs mine is next week
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coincidence .I am from China and our exam is also in a hour.
@Leonidas Zechariah Oh, these bots aren't completely dumb. Next time don't make the accounts on the same day and youll be a bit more believable.
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Shia Faith IKR
His calm and gentle voice honestly is what helped me be able to grasp exactly what he's referring to. I have absolutely no knowledge of this field but I do now 🙂. I just hope that smile doesn't turn into 🤪 after messing around later.
Thanks a lot for explaining in great understanding detail.
Kim
Yeah. You're right haha
Lols that voice makes you understand everything
This is AWESOME!! I’ve been out of school for decades and needed a refresher, I didn’t realize just how long being out of school would affect my comprehension rate until I started watching videos to learn again. I say all that to thank and commend you on your ability to slow/break things down so they’re easily digestible. And thankful you don’t have the “nail on a chalkboard” sounding voice/microphone. Thank you so much for sharing your knowledge for free.
I think that you are have a very relaxing, calm voice. I’d listen to your lessons any day. But the way you break down a complex topic is a gift. I’m going to tell friends about your talent. Best wishes!
Omg thank you , it was really simple and easy to understand
Also your voice is amazing
Great explanation of Faraday's Law of Electromagnetic Induction. Pretty clear and concise. A change in magnetic flux induces an EMF in a loop of wire. Keep teaching :)
This video made it look so easy I wonder what I didn't understand before...
This is just so good ❤️
Master Faraday's Law in just 12 minutes for FREE!!!
ua-cam.com/video/ZmSgzhZb13U/v-deo.html
Great video, I’m 50 years old and just wanted to watch something random I did 30 plus years ago (before UA-cam😂) You’re a great teacher and speaker!
This video is very helpful, make more please.
The video was well made. Thank you
Very helpful videos!
Well, my teacher sometimes is more confusingly obfuscate,trying to make things clear but that baffles me.......
GREAT JOB MAN
Thank you once again.
Very good video/lecture. I wish I knew the direction of current flow!
Thanks for the video. In the first example, there must be no current in the right coil since a voltimeter is an open circuit.
I love you man 😍 thanks so much you are really the best
Just like the way you explain concepts,,,,I can comfortably dodge lectures coz am okay with this🥰
Thank you sir.
Only in the case of the moving magnet was the emf caused by the change in flux. In the other two cases the emf was caused by the motion of the wire through the magnetic field. Faraday's Law obfuscates the principle involved.
thank u so much i have an exam on Tuesday this is helpful.
A 50 turn coil has a resistance of 2.5ΩΩ If it is enclosed in an area of 25 cm^2cm2, what would be the rate of change of a magnetic field parallel to its axis to induce a current of 0.5 A in the coil?
Thank u so much
How do i calculate amperes if there is no resistance connected in the circuit
Please do one on biot savart! I'm so confused
Much love my brother
Ooh wow thank you so much
Im curious as to why it is the full area not the circumference of the area the wire makes up because the electrons only flow through the wire and not the area the wire encompasses. Maybe that is already taken into consideration by the equation somehow?
Excellent!
Man u are so good enough at it....i wanna u to be my teacher.....
i cant understand the angle determination with respect to nomal line as well as the imaginary normal line difination ,,can anyone please explaine it??
Thank you.
thank you so much from Turkey!
Thank you so much
I acually thought the angle should be 90 degrees because the magnetic field is perpendicular to the coil
In your other video you said induced emf and induced current are the same thing, but here you equated it to voltage. Which one is it?
thankyousomuch!!! 😭😭💋💗💗
This is helpful on my study for my incoming exams this Monday wish my luck.
howd you do on your exam bro?
howd you do on your exam bro?
@@user-fq1ze8ze4d I passed.
@@user-fq1ze8ze4d I passed and I am graduating This year also thanks for asking mate!
Dang me too😭🥲
would it be easier to calculate power using power = current * voltage (in this case EMF) instead
Thank You
If the resistor has a current flowing through it, it also has a voltage drop, but the wire is shorted and must be the same voltage everywhere in the wire, assuming a perfect wire. This contradicts the current flow. Can anyone explain why this way of thinking is wrong? Can we not use circuit analysis with emfs?
My professor took an LED and connected both of the legs together in a loop held it in an alternating magnetic field and it lit up the LED. Im having issues understanding what the voltages on either side of the LED would be.
Damn u nerdy! I didn't get a single word u just typed
Why are you watching this video then? lol
I have a test in 2 days and I'm just now understanding the material. Thanks a lot!
lmao same
thank you
nice explanation XD
H
as an international student studying engineering major in her third language, you are my savior. Thank you so much!!!
Hard to understand why the area that the coil of wire encompasses, or the total flux it encompasses, will be a factor. Why would it matter to the electrons inside the wire?
Are there any books on this that would help someone that has 0 experience or knowledge on the subject. I would like to build a generator
Textbook of electrical technology by BL theraja
Thank you
How do I know which is the final or initial Flux or time
Thanks
What device you use as the blackboard??
Show some love guys. What a kind man.
What do you mean by normal line in 5:48, and how do we find it ?
the normal line is perpendicular/90 degrees to the magnetic filed lines
@7:45. How do we know it’s magnetic field is parallel to the normal line?
they then represented by a cross or a dot.{into or out of coil}
shouldn't the angle be 180 instead of 0 between area vector of the coil surface and magnetic field vector.?
I think you are taking care of minus sign in the equation e = - N dՓ/dt. But it is misleading. What I suggest is that the angle between two parallel vectors is zero not 180.
@@AshfaqAhmad-ob8ov I acually thought the angle should be 90 degrees because the magnetic field is perpendicular to the coil
If i get gold in physics bowl I'm coming back here to edit my comment
How'd it go lol
Ima die, I have a chapter in physics I don't understand and my final exam is tomorrow. R.I.P my grade.
Thanks you អរគុណបង👏
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I hereby declare this guy as the God of Knowledge. Anyone who disagrees can fight me.
Paddy Taringer - "Wanna fight about it"
So nice my teacher please make for us Maxwell's equation sir
Back when you actually worked with numbers and not abstract vectorial identities
Here in Zambia even our lecturers watch your videos 🤧
Does anybody know what happens with the negative emf? Like what does it means if it was negative?
the minus sign is due to Lenz's Law and it is because of the conservation of energy. "the direction of the induced emf/current is such that it opposes the change which created it." basically the magnetic field that was produced as a result of the induced emf is in the opposite direction to the original changing magnetic flux/field.
Adam...
Heykelini diksen tassagina beton yetmez.
Shouldn't power dissipated be multiplied by the time? 1280 is the wattage meaning the energy dissipated per second (j/s).
This is late but in case anyone else is wondering: time is taken into consideration. An amp = 1 coulomb per second.
Strange that your "physics 120 final exam review" video doesn't include Faraday's law, but not a big deal since i found this video.
Mark wahlberg did it again🙌🏽
the only one i wacth...
What is the normal line?
Line that's 90 degrees from the surface
@@kevincalma4372 haha i have passed the exam and i got 14.5/15 it was 3 month ago before this shit spread out
what do you mean by normal line?
DapaChrons an imaginary line perpendicular to the surface of the coil
Yes I was confused here too, but he’s talking about the angle between the normal line(line perpendicular to the surface of the coil) and the magnetic field line which just so happens to also be a perpendicular line yielding a 0 degree angle because they are the same line.
What app did you use to record this?
10:22
Why did we make it positive?
because the negative is not necessary, it's only there to show that the magnetic field created by the current opposes the change in magnetic flux
Why flux have cosine function
1:37
Man you have a video for every possible problem dont you 😅
I didn't get why angle is zero
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Who are these dislikes? Slap them.
Got a test in 2 hrs 😭😭 god help me
Me in 30 minutes 🤷🤷
@@Rah_4_Man good luck brother
I have finals exams tomorrow wish me luck
How was it
I GOT E= 72V not -160v
its -160, you must have done a math error.
My physics teacher stutters while he speaks and when he is done I don't understand what he has just explained.😔😞
But you are the best teacher that I ever had
Where are you from
Well mine is more confusingly obfuscate,trying to make things clear but that baffles me.......
GREAT JOB MAN
Kaway kaway sa mga magboboard dyan!
huh?
Why the fuck is there a voltmeter measuring the current.
do you like this position, do you like this position
STEM pa mga tanga
menetic?????
Faraday's Law is the wrong title its James Clerk Maxwell equations.
bruvva thats not how you symbolise phi...
If you repeatedly press 1, you can hear him repeatedly say the N-word.
BADvideo, because you are ambiguous about the signs and facing of a lot of IMPORTANT things : the angle between B and the normal vector of the surface is not clearly explained. The sign of the induced EMF and also the sign of the current are IMPORTANT things when you study induced EMF.
This kind of math seems so useless, I wonder how (if even at all) they used it 200 years ago. How to calculate magnetic field? How to get these data? All magnets are different, differently shaped. Is there any way to use such formulas for home purposes?
2024 and this guy is still making people pass.👌🤌👍🙌
thank you