Why current lags voltage in inductors (logic) | Alternating currents | Physics | Khan Academy
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- čas přidán 12. 05. 2021
- Let's explore why the current through a pure inductor lags the voltage by 90 degrees.
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Created by Mahesh Shenoy
Highly appreciate the effort that went into animating this stuff, the excellence in teaching the concept to make it crystal clear, the humor which makes this all interesting. This channel truly deserves more attention.
Yess...
Without any doubt we can say that Mahesh Shenoy is the best K12 teacher in India. Your content is way better than any CZcams channel handling the K12 content.
I love how the way he's explaining this is just like how you would tell a bedtime story. You can hear the fun in his voice.
The analogy in unprecedented!! Excellent !!.. but, still I wished if you mentioned what happens regarding the back emf and magnetic field
exactly
The way you say "beautiful, isn't it" makes it even more beautiful ❤️❤️
Keep going ❤️
plank analogy...mind-blowing...
The analogy is brilliant but it doesn't help in uderstanding why, for me at least. But it sure helps to remember that it works that way
dude as the current changes[increases] emf is induced in the inductor which does not allow current to immediately pick up with the voltage,it oppossses that change.When voltage is zero that would be the maximum current,it is like giving an decreasing acceleration to a body on friction less surface[since resistance is zero] and then changing the direction of acceleration[decelarating it] and at half cyle of voltage it becomes zero since it has gained that amount current in that half cycle of voltage.hope u understand .
We can also use the analogy of simple pendulum where, voltage as displacement and current as velocity of pendulum
At mean position displacement is zero anf and velocity is maximum
Amazing Analogy , now I clearly Get it ,Beautifully Explained!!!
@ 6:52 For me, the intuition is in the equation V = L . di/dt. It simply says that the voltage is high(est) when the slope along the current-curve is big(gest).
outstanding explanation with the sliding box analogy.........remarkable video ..........prize winning i would say. God bless you sir.
Highly appreciate ur effort for making a clear image of these concepts ❤️
Beautifully explained 👍🏻 loving physics ❤️
U r just 💫 ...
Your explanation ,your animation everything blows up my mind...
I've just opened your video because I'm stuck on the sin function of the derivation... But suddenly the lecture ended ... Everything was just *frictionless* ❤🔥
Waaaoooohh!!! That analogy was superb 🤯
When God sends a physics teacher , this happens 👌🤩
Just amazing ❤
I really like this explination, I was looking for somenthig like this. Thank you very much
Really great analogy, and it's not too far from the real magnetic field and emf analogy, just different naming
That’s a wonderful analogy with the plank and the box! And it may even hold at high frequencies, since it would seem, the box would be “bouncing “ up and down more than moving laterally along the plank and thus signifying very little current due to the greater inductive reactance.
Just love it ❤!
I just want please don't stop teaching, mygod what an explanation.
Great example sir 👌👌😙😙
God of teaching , not met such teacher in my entire life ❤️
You are a great teacher !!!
6:52 this is lineally why i'm here, no one else in this rat race is wanting to answer this question. Thank you for explaining.
Love u shenoy sir ❤️❤️❤️❤️❤️❤️
Very informative
A quick reminder the voltage graph will be higher than the current graph although the video is definitely the best
Lovely!
Excellent and amazing teaching method.
How nicely explain 👍
Amazing
Good explanation
anology of plank was awsome i appreciate your imagination sir
Thanks sir
Thank you sir 🙏
Thank thank thank thank thank sir ji love
my goodness you are crazy...so simple but noone even dare to think about it
Is this man even real? ( Asking with teary eyes)
here my analogy to this question
notice that the current is higher when change in voltage is higher, this can be explained as follow
since inductors hate change in current the the inductors will introduce high EMF when there is high change in voltage and this is why we toke derivative in the derivation of current
great teacher no doubt, V is directly proportional to I , so v=ir, I=v/r so v> I , then phase difference of inot should be less than vnot right sir ?
Appreciated.. but how is the AC voltage maximum the moment we connect it to the circuit? Should it be 0?
With the analogy, what about when we just turn on the voltage and the current being negative maximum?How can we explain that?
Wow
Waiting for capacitor video😁
I wish our shool teachers would teach this way in online 😓
Ok same
When I open the volt the inductor resists the current but doesn't that mean it will resist the voltage also?
❤️❤️❤️❤️❤️❤️❤️
What about ohm's law...
Which playlist does this video belongs to? Can I get the link 🔗 of that playlist?
czcams.com/play/PL2ub1_oKCn7ruZr0B-ZxHcJb7tSRS0HlO.html
Salut.
What is current at that instant when mechanical analogy starts at Vs=0 ?
bro he related velocity with current so if velocity of the anology is zero then current would be zero but still has voltage
Why the quantity of current shown more than voltage in the Graf? Normally valu of current less than voltage, please explain
The magnitude of the voltage and current are taken are arbitrary (random). Its just to show the difference in voltage and current. Technically we are not comparing the magnitude of the voltage and current5 but just the phase.
I'm starting to become a fan of a teacher ,thats strange here at CZcams we only become fans of singing cats.
Is this Sal speaking with an accent?? Everything else is identical. The intonation, handwriting, etc.
With full hope of finding an answer to my doubt, I opened khans video, but i really get disappointed. My question is, how can an inductor attain negative maximum current as shown in the graph at the begining even before voltage starts increasing from zero value at t is zero? Nowhere in video this point is touched.
were you able to find an answear, i have the same question
The analogy made is trash.
You need to have brains
If this is trash then I think you are Einstein ..isn't it?
@@biswaranjan_4425 no bruv. I am Newton.
Yeah pata tha.
You gave wrong interpretation of light theory and by youtr time electromagnetism unified theory didn't exist..so yeah..it's difficult for you to understand..I get it...get some knowledge of new physics of our time.
If this is trash your garbage