Electromagnetic Induction
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- เผยแพร่เมื่อ 28 ธ.ค. 2024
- 071 - Electromagnetic Induction
In this video Paul Andersen explains how electromagnetic induction occurs when the magnetic flux of an object changes. The magnetic flux is product of the surface area perpendicular to the magnetic field and the magnetic field strength. Microphones and generators are examples of devices that utilize electromagnetic induction.
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All of the images are licensed under creative commons and public domain licensing:
Bach, Eviatar. English: Faraday’s Experiment to Try to Induce a Current from a Magnetic Field, with a Battery on the Left, an Iron Ring in the Centre, and a Galvanometer on the Right. This Diagram Is Based on One Found in Page 263 of Physics: Principles with Applications, Fifth Edition, Author Douglas C. Giancoli, Illustrators Patrice Van Acker and Tamara Newnam Cavallo. The Explanation in the Book Reads as Follows, with the Left Coil Being X and the Right Coil Y:, September 20, 2011. Own work. commons.wikimed....
“Faraday’s Electromagnetic Lab.” PhET. Accessed December 8, 2014. phet.colorado.e....
“File:Hans Christian Ørsted Som Ung.jpg.” Wikipedia, the Free Encyclopedia. Accessed May 28, 2014. en.wikipedia.or....
“File:Oersted Experiment.png.” Wikipedia, the Free Encyclopedia. Accessed May 28, 2014. en.wikipedia.or....
“Michael Faraday.” Wikipedia, the Free Encyclopedia, December 5, 2014. en.wikipedia.or....
When you get a better explanation from a free 8 minute video online, than from a 1 hour lecture that I need to pay for.
One of the best sources to cram before finals tomorrow
Or maybe, due to lack of interest and repetition of studying to the same teacher you take it for granted that he/she can't explain.
@@samirumair4548 Always funny seeing randos online try to assume who you are and how you act or think.
@@kurimiaisukurimu My assumption is an ambitious one yes, but lacklusters like you are a common encounter. Good job liking your own comment as well, cheers dimwit.
just glad i didn't have to pay ...but i learned
man i wish i had a teacher like you
i know right!
same here
Brodie Fenner true
gaf oh woops said it backwards
Ya I agree with you .
Dear Mr Andersen, you have single-handedly saved me from the embarrassment of failing my A-Level Physics. Thank you very much!
This is an 8 minute video. The classes I take are 45 minutes. I easily understood what was happening in the video, but in school my teacher just says a bunch of unrelated things, and expects us to get it. Thank you so much!
I am your friend from Iraq, you deserve the word of a world and deserve to have 10m shared, I love you, my friend
Been studying this for a week straight now and this is the first time it’s made sense! Thank you!
Spent hours looking for a cogent explanation for this. You're killing it buddy. Thanks so much.
5 years later and Im always coming back to bozeman for an in depth and clear review of things I forgot 👌
I love those animations. They are so intuitive. I wish I had this when I was in middle school!
Are you kidding mr this was the best video I watched. This was very helpful! Thank you!
You literally got me interested in this and i am already doing a 2 hour research to understand the many implications of this phenomenon. Really, amazing job!
It's the ideal teacher. When I watched the exact same topic from my University professor the quality was 10 times worse than this one. I'm really happy I have TH-cam :)
Can't get a better explanation than this.
This video alone made me understand magnetic flux and its relevance to induction and current really easily. Thank you sir.
This is the best explanation of induction I’ve seen.
never seen better teacher than you
Just a few minutes ago, I did not understand this concept at all but after watching this, I'd say I'm a bit more knowledgeable about it now. thank you sir!
excellent use of google slides as lecture material. incredibly helpful insights
Mr. Andersen + Doc Schuster = Awesome teaching!
it was a bit hard to fathom in the begining, however it became a lot clearer with the visuals in the last minutes of the video thank you so much and good luck
Thank you, Mr. Andersen. This video is exactly what I was looking for.
coming in clutch for all of us stuck taking physics in pandemic online classes with professors that have no communication skills at all. it's either the easiest or the hardest stuff to learn depending on who teaches it and how in my opinion
Thank you Mr.Andersen for making me motivated to physics
I wish my science teacher was you...
Genuinely really helpful. From someone with a Principles of Electrical Science exam in a few days time
Thanks you so much sir, I couldn’t understand a single thing from my tutor. Thanks a lot
The world's best teacher thanks sir
You are explaining so much better I wish I had a teacher like you. You are incredible thankyou.
excellent explanation! I am currently learning marine boat systems and your video was so handy, explaining the complex subject in simple, concise, precise manner - the things better than a school teacher.
Very professional,calm and ponctual, thank you so much for this great explanation.
Just wanted to say, I wouldn’t have been able to graduate with a 3.9 gpa as a health science major without your help man. Your fucking awesome bro
Magnificant explanation 👑💯
I need teachers like you sir
You are an example of an ideal teacher.
great video! simple and easy to understand
This explained a lot, so only change in magnetic flux matters. This stuff is mindblowing, we are creating electricity literally out of nowhere, just with plain movement force of magnet through the magnetic fields created in coils. Whole idea is crazy but works.
So much thought was put in to the animations. I really liked what you came up with for the field. Thanks
I wish I had teachers like you in university! It was so difficult to us to understand without finding a good teacher , also youtube then wasn't available
Great video, it's been a long time since AP physics and I needed the refresher
This was so helpful, I love the way you breakdown the concept into lay man's understanding
very good explanation with excellent diagrammatic animation.
This video set off a lot of light bulbs in my head. Thanks for sharing this. I didn't understand why there was only current when the objects were in motion until the magnetic field pointers were shown in the background. The polarity of the object moved through the coils causes the electrons in the coils to move around and re-order themselves, which creates current in the coils. Thus, at any point if you stopped moving the object, the electrons in the coils would have no reason to move, therefor creating zero current. Am I understanding this correctly? This electricity shit is blowing my mind. And the fact that there is this "conventional" and "reality" way of describing what is happening in the circuits doesn't help me one bit to understand. Some professors will say "as the positive charges moves", others will say "as the electrons flow"....jesus christ make up your damn mind so I can understand! ... ok sorry ranting now lol, back to learning physics. Great video!
Same for me! electricity and magnetism have always felt overwhelming
subjects for me but at least now I think I understood something
critical.
Thanks a lot for this comment. This really helped me understand it.
Preach bro😂
I completely understood this. Wow. I have been so lost all semester I’m stunned.
It was well explained, thank you from France !
New semester begin, willing to get some preview here XD, Thanks for your work
Thank you very much Mr Andersen! The explanation was short and very helpful! I wish I had a teacher like you! Keep up the good work!
you have just clear my concepts sir,
I love this video..I now understand what I don't in those past years..thank you.
Hello, Mr Andersen, I am becoming a big fan of you. You are so great in discussing things.. I've read a lot of books about electromagnetism and electromagnetic induction.. but I didn't understand any of them. You and your videos are a great help. Thanks!
I love this lecture, thank you, Paul Andersen.
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ohhhh!! so thats how generators work... wow... I did not expect to learn that... that was really cool
I didn't wanna to have assistant teacher, but now I wish to have for the first time!
Thanks a lot!
That was the most helpful video I have seen today
I was about to buy a wireless charger, and somehow, it led me to your video.
Will come back, definitly.
whats the name of the program that you used in the video to move the things teacher ??
Learning that in the context of TMS for psychology and it was really helpful
Great exposition! Wonderfully explained!
Howdy.
In electromagnetism induction can mean two things. It can be the total flux.
The unit is Wb = V x s. The old unit is Mx (Maxwell).
Induction can also mean the electromagnetic force (voltage) a varying or moving magnetic field produces in a conductor.
Regards.
My friend you are an amazing teacher
Thank you Mr. Andersen for this fantastic lecture.
Great talk, great visuals. Thanks!
Thank you, it helped a lot. I intend to watch your other videos too. Take care and keep up these awesome videos :)
Amazing video, extremely comprehensive.
All the doubts I ever had just vanished. Thanks for quenching my thirst
Cyanvaya can you please explain how electromagnetic induction occurs (as an exam type answer)
@@kyliek.9481 Electromagnetic induction is the production of electro motive force across a conductor due to change in the magnetic field. ✌👍
As a recommendation: the last part of your video should be the first part. There is where I really understand something.
I understand this and thank you. but I was left with this question. Your rotating magnet in the last example does not go through the wires; it is only next to it. What happened to the coil- magnet perpendicularity relationship? Isn't this a very inefficient way to generate electricity?
well explained my good sir you've earned a new subscriber
Great video! Very simple explanation.
Thank you mr Anderson for giving me inspiration for my next invention
Props to whoever figured this out bc I could never with the way schools are today😭😭I need to think outside of the box more
my teacher and my private teacher combined struggled to teach me this in a whole semester when u did it in 7 minutes
Extremely Helpful. I am going to use this for one of my chargers for my phone
That was really awesome explain .. I really now understands the idea of how it works .. thx bro
Interesting use of graphics. I am curious about something.
This demonstration shows induction in an inertial reference frame, such as a table top in a laboratory. What if the entire system were accelerating, or in zero-g? Would there be slightly different behaviour of the needle on the galvanometer?
BETTER THAN KHAN ACADEMY AND CRASH COURSE
you save a Million of students mainly to understand how the universe work, not only for passing the exams
Man you are super good teacher!
Thank you
Instant like and subscribe! Excellent animation. Superb video.
great presentation, why are we not using more of this?
the go-to when you are missing basic concepts the day before an exam.
lol, read your user name as: "the N word girl"
True
Thank you Mr. Anderson!
wow, very well demonstrated and helpful!!! the best video around the world
I did understand and I really like your videos, they have been so helpful since I discovered
Hello, i still have questions about how we are supposed to harvest this electrical current if the entire circuit needs to be switched on and off in reapect to the magnetic flux change? What kind of switching armature do you have in mind?do you use a physical switch or a rectifier type of conponent?
Awesome content. Right to the point.
Now I just want my teacher to suffer for overcomplicating this concept.
No why
Dear Bozeman science, based on this science I have a pertinent question. Iron decadohedrons made ages and ages ago, if you were to wrap that in very thin copper wiring completely around it, in a sense insulating the iron core with copper, would it produce a magnetic flux based on its engineering? And if not, say the decadohedrons are hollow to start, could you add an element inside the iron core and then wrap it to manipulate the magnetic flux?
Why aren't there teachers in our schools like you?
Thank you Mr. Andersen!
I understood the concept.Thanks for the video sir
Congrats for 1 million subs sir
Thank you for explaining how a generator works.
I understand that current flows with flux in the field but not why the current changes direction when you open and close the switch in Faraday's apparatus. In the first coil, the current can only flow in one direction (DC) because of the battery, right?
Look up inductors
WOW sir !
You've made an AWESOME video !
your explanations are th best.. thank you sir.. I understand from you so easily 😃❤
In the water example at the end, would increasing the number of turns in the coil mean that you would have to expend more energy when turning the wheel? I'm thinking along the lines of Lenz's law
More loops=greater the intensity.
So - With this wheel setup.... If you tapered the pipes of your rain-gutters, to make the water run through them faster: You could generate electricity from them when it rains?
Excellent thinking, although there just wouldn't be enough flow. You could however collect that into one container and push the flow onto a water wheel and generate through that. Even that may not be enough to generate much usable energy, however in large quantities, this is what they do. Collect rain/river water, build pressure (in a dam) and send it down a channel to rotate a wheel as demonstrated in the video. You don't need a dam's worth of water, but do need a constant flow to get some useable electricity!
Beautifully explained!
Yes! Thank you so much 😊
There are so many types of stainless steel stock pot on the market. 304 grade, 430 grade, or 205 grade.
I'm choosing a big stainless steel stock pot to cook meat stew. I will be using it on an induction cooktop.
Is it correct that one material conduct more heat than another material on induction cooktop? or as long as they are a little magnetic, they all have the same cooking speed?
You want a "high specific heat value". The higher the value the more heat that is added per degree of temperature increase. I can understand why it would seem the other way round. What you have to remember is that you don't actually add heat or take away in the physical sense, you simple increase or decrease the temperature per unit mass, which results in an increase or decrease of heat added or heat extracted from a system.
Why do you say there is no magnetic flux when there is still 1 line going through the conductor? Other than that I understood everything, wonderful video!