Why current lags voltage in inductors (logic) | Alternating currents | Physics | Khan Academy

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Let's explore why the current through a pure inductor lags the voltage by 90 degrees.
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Created by Mahesh Shenoy

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12 май 2021

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Комментарии : 73

@lone_berserker 2 года назад

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.

@saloni9454 Год назад

Yess...

@SAFELORE 3 года назад

Without any doubt we can say that Mahesh Shenoy is the best K12 teacher in India. Your content is way better than any RU-vid channel handling the K12 content.

@colorx6030 6 месяцев назад

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.

@tanmayking3252 2 года назад

The way you say "beautiful, isn't it" makes it even more beautiful ❤️❤️ Keep going ❤️

@mibrahim4245 3 года назад

The analogy in unprecedented!! Excellent !!.. but, still I wished if you mentioned what happens regarding the back emf and magnetic field

@NumbToons Год назад

exactly

@raghukancharla6004 3 года назад

plank analogy...mind-blowing...

@maximgodov7010 2 года назад

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

@karthikchowdary4184 Год назад

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 .

@jagadishmorabad2293 Год назад

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

@Pushed2InsanityYT 2 года назад

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.

@harshkhulbe4935 2 года назад

Waaaoooohh!!! That analogy was superb 🤯

@feelingzhakkaas 3 года назад

outstanding explanation with the sliding box analogy.........remarkable video ..........prize winning i would say. God bless you sir.

@jacobvandijk6525 4 месяца назад

@ 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).

@lekhatishbedse2275 3 месяца назад

When God sends a physics teacher , this happens 👌🤩

@muhilkumara8194 2 года назад

Great example sir 👌👌😙😙

@user-cq6sj3ey8u 3 месяца назад

Just amazing ❤

@chathurikadilhani1951 Год назад

Highly appreciate ur effort for making a clear image of these concepts ❤️

@madscience8302 3 года назад

Love u shenoy sir ❤️❤️❤️❤️❤️❤️

@menla6055 6 месяцев назад

I just want please don't stop teaching, mygod what an explanation.

@tenzindorjee7689 2 года назад

Beautifully explained 👍🏻 loving physics ❤️

@aahilrafiq4850 2 года назад

Amazing Analogy , now I clearly Get it ,Beautifully Explained!!!

@vaibhavtiwari8113 Год назад

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* ❤‍🔥

@saifullahmushtaq4628 2 года назад

Very informative

@aalaa4146 Год назад

You are a great teacher !!!

@mohammadzakaria6707 7 месяцев назад

A quick reminder the voltage graph will be higher than the current graph although the video is definitely the best

@nikis7742 Год назад

anology of plank was awsome i appreciate your imagination sir

@rajkasaudhan8293 Год назад

God of teaching , not met such teacher in my entire life ❤️

@klevisimeri607 Год назад

Lovely!

@REviewOFF07 2 года назад

Just love it ❤!

@shiwamkarn5215 3 года назад

Amazing

@kalpanakumawat6857 Год назад

How nicely explain 👍

@montir4510 3 года назад

Thanks sir

@navindraarjunaabeyesekera7864 2 года назад

Good explanation

@amirphilip2234 10 месяцев назад

Excellent and amazing teaching method.

@manuellopezanido 10 месяцев назад

I really like this explination, I was looking for somenthig like this. Thank you very much

@zizo-ve8ib 2 года назад

Really great analogy, and it's not too far from the real magnetic field and emf analogy, just different naming

@roobear5357 Год назад

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.

@praveenkumarmorabad1358 Год назад

Thank you sir 🙏

@factsss7 3 года назад

Thank thank thank thank thank sir ji love

@lucarioind2203 2 года назад

my goodness you are crazy...so simple but noone even dare to think about it

@shreyakundu9331 4 месяца назад

Is this man even real? ( Asking with teary eyes)

@b.srinivas9567 3 года назад

Waiting for capacitor video😁

@aniketprasad7700 3 года назад

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

@shilpakhatun4526 2 года назад

Wow

@shebanisarkar3070 2 года назад

I wish our shool teachers would teach this way in online 😓

@chanduroyalschandu649 2 года назад

Ok same

@vaibhavkrishnamahesh8128 Год назад

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 ?

@abhishekshinde8913 3 года назад

❤️❤️❤️❤️❤️❤️❤️

@Dhyaneshwar-um6ln 6 месяцев назад

With the analogy, what about when we just turn on the voltage and the current being negative maximum?How can we explain that?

@omkarade746 10 месяцев назад

What about ohm's law...

@MATHSdotPHYSICS 10 месяцев назад

Appreciated.. but how is the AC voltage maximum the moment we connect it to the circuit? Should it be 0?

@ahmednasr6171 3 года назад

When I open the volt the inductor resists the current but doesn't that mean it will resist the voltage also?

@tsew1ng Год назад

Salut.

@ayuankhan4318 Год назад

What is current at that instant when mechanical analogy starts at Vs=0 ?

@karthikchowdary4184 Год назад

bro he related velocity with current so if velocity of the anology is zero then current would be zero but still has voltage

@Jaydeep418 2 года назад

Which playlist does this video belongs to? Can I get the link 🔗 of that playlist?

@vivekgupta3692 Год назад

ru-vid.com/group/PL2ub1_oKCn7ruZr0B-ZxHcJb7tSRS0HlO

@HJeff 2 года назад

Is this Sal speaking with an accent?? Everything else is identical. The intonation, handwriting, etc.

@tarunnagarajan4888 3 года назад

I'm starting to become a fan of a teacher ,thats strange here at RU-vid we only become fans of singing cats.

@rajeshchandrasekharan3436 2 года назад

Why the quantity of current shown more than voltage in the Graf? Normally valu of current less than voltage, please explain

@pranilshoots9523 Год назад

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.

@vivekbaagan5778 Год назад

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.

@simozy4475 Год назад

were you able to find an answear, i have the same question

@user-nj7mf7ps4s 3 года назад

The analogy made is trash.

@pavansakthivelvijayakumar7756 3 года назад

You need to have brains

@biswaranjan_4425 2 года назад

If this is trash then I think you are Einstein ..isn't it?

@user-nj7mf7ps4s 2 года назад

@@biswaranjan_4425 no bruv. I am Newton.

@biswaranjan_4425 2 года назад

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.