Calculating displacement & conduction current | Electromagnetic waves | Physics | Khan Academy
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- čas přidán 16. 06. 2021
- Let's apply Ampere Maxwell's equation to calculate the magnetic field near charging capacitor plates. The displacement current inside the wire is negligible, while that between the capacitor plates is not.
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Created by Mahesh Shenoy
Whenever I find myself overwhelmed by a concept I just come to this channel and always find the best explanation , this teacher is awesome
Same
What an excellent educator! I love all your videos. (I think that your videos are underrated)
yes
3:51 you told how electric field inside the wire is 0,
I searched a lot about it on youtube but I finally found it here.
Thanks for covering all details.
They all matter a lot to someone.
its not 0 its neglegible compared to the conduction current. Current itself is possible only because of electric field inside the wire.
Thank you for the effective and skillful explanation
Amazing
Thanks a ton.... I have no words to thank you for giving such a quality education and that too for free❤️
Mahesh Sir is most Brilliant teacher I have ever seen .
Very Clear and flawless teaching
MIND BLOWING
Superb. I teach physics and definitely enjoyed this video. Wish this was around when I was in high school.
Thank you so much sir...i enjoy your most of videos and clear my all the concepts..that increase my curiosity in physics too...i don't know you sir but don't stop it...love from gujarat. ❤️
Nice video and presentation.
The ampere law deals with direct current while Maxwell’s displacement current law deals with alternating current. The two combined enables generalization of space wave, the electromagnetic wave.
Crystal clear
Thank you so much sir.
Nice video and presentation.
Remember that, electric and magnetic fields doesn’t exists in vacuum alone without vacuum permittivity or vacuum permeability. So where did the permittivity and permeability came from? The answer is Aether of vacuum.
Made it so easy ...awesome..Thanks a lot🙏😊
hey, It will be too awesome to imagine, you start making videos for competitive exams like jee or neet..
Excellent! That even apply to finding return path of the transmission line theory
great explanation!
Wonderful clear explanation with great intonation makes it easy to understand even for stupid politicians!
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thank you sir
I appriciate your work, well done 🎉
Sir make video on why moving charge create magnetic field through special theory of relativity only to get fell of that
Thanks man ❤
👍 great
Ossom video..
But in calculation of conduction current magnetic field you neglected the electrical field change created magnetic field according to Maxwell, so it seems that maxwell eqeuation violates the conservetion of energy.
Mukesh, I don’t understand why you say the Electric Field at loop a is near zero? The E Field should radiate outward. Can you explain further?
Dear Mahesh Sir, I am an educator. I enjoy all your videos! You have a great skill in story telling. I just have one question. Expecting a reply.
Which tool are you using to create the videos? Sketchbook Pro or Sketchbook Motion?
Thanks for the Reply.
Sketchbook pro (which is just sketchbook now, its free!)
@@KhanAcademyIndiaEnglish Thank you very much sir. I was wondering how are you making all these wonderful animations. Especially in Biology, the Ear, Eye Animations were wonderful. Most of your Semiconductor Videos were an eye opener to me as an Electronics Faculty. I recommended all your Electronics and Electrical Videos to my students. Thank you very much for the reply. I really appreciate your dedication in creating such beautiful animations using the Flip Book Animation facility in Sketchbook. Also I must mention that you have a great drawing skill. They are amazing drawings. Wonderful usage of the tool!
@@SAJAN_ECE Wow, thanks a ton for the words of appreciation. That means a lot coming from another teacher, and it made my day :)
Big fan sir what is your name
Why is the electric field always preferred and not the magnetic field to define something in an electromagnetic wave..??
For detailed explanation czcams.com/video/8ZYFYUFRblM/video.html
Any body here...clarify my doubt...
1st case:
Consider you are having 8 apples. You gonna share that to 2 boys
How do you do? Well it's easy eachu boy will get 4 apples
8/2=4 here 4 represents the no. Of apple each got
2nd case:
Consider you are having 0 apples and trying to share that to 2 boys
Now two boys won't get apples. So there's share is 0
0/2=0
3rd case:
Consider you are having 8 apples but there are no one to share this. Which means you are not going to share those apples. That is, there are no boys which means there are no more shares RIGHT!!!!!
As per my point of view 8/0 must be equal to 0 only.
The ans infinity holds good when i introduce limit concept. But there is an irony when i think like this.
Please clarify my doubt. I am wandering with this for 2 years
See 8/4 means that 4 should be added 2 times to get 8 so this gives us 8/4=2 . Now 0/2 means there is now need to add 2 to get 0 so 0/2=0 . 8/0 means that how many times 0 should be added to get 8 so if we continue adding it it won't reach to 8 . 8/0 = 0+0+0+0+.... Infinity. this give ultimately there sum 0
@@adityasonawane8912 in second case 0/2 as per ur answer 0 times we are adding 2 so that we get 0
In 3rd case 8/0 as per ur answer if we add 0 infinity times we can't get 8
Here infinity doesn't mean undefined 0/0 like expression is undefined.
The graph of 1/x leads to infinity at x=0 so infinity here doesn't mean undefined.
Its like 0×infinity which is undefined
Edit(for visualization purpose): if it is zero boys u can give unlimited amount to noone as u wont lose any apples. But if u have zero apples then u can give nothing unlike case3.
Focus on Frame of reference:
It is not just only about how many apples those boys received(as they receive nothing in case 2&3). It is also about how many apples u give or lost.