Why current leads voltage in a capacitor (logic) | Alternating currents | Physics | Khan Academy

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Let's explore why the alternating current in a capacitor leads the voltage across it by a quarter of a cycle.
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Created by Mahesh Shenoy

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27 июл 2024

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Комментарии : 74

@adityaaryan1610 2 года назад

I watched almost all your electromagnetism videos and my misconception that great content on RU-vid must be highly viewed or should come from a famous channel has been broken. Unbelievable that such quality content is freely available for all that too in small 10-12 min videos. Your method of teaching so intuitively and logically is awesome!!

@noone12323 5 месяцев назад

I don't know that if Khan Academy wasn't famous 2 years ago but it is very well known now. I have a feeling that its website was still famous at that time.

@abinaya.b1168 2 года назад

Thank god he's not teaching in hindi😄😃

@vasukumar5727 Год назад

i didn't get that at first but..... 🤣🤣

@Amitkumarpharswan 10 месяцев назад

😢@@vasukumar5727😢❤

@DarkImpulse18 5 месяцев назад

hell yaah man

@sukritineogi8195 5 месяцев назад

But why?

@secretg0302 3 месяца назад

Mai smjha ni , khba kya chahte ho

@jimjk7 2 года назад

I've been reading and watching videos on this topic, but couldn't find any satisfactory content that could explain it in such intuitive way! Now everything make sense. Thanks!

@OnlyOne1Dee 2 года назад

Am not India but honestly speaking India as classic and well explaining tutors, thank very much for the video

@uvaanstree854 10 месяцев назад

I can see how much passion u have for teaching in ur lectures and I appreciate ur work man 😊 keep going and do well✨

@akashudayanga6727 2 года назад

I watch many videos to find what happening here but this video is what I search for. Thank you very much sir!

@chinmayelastname3544 2 года назад

This is the absolute best channel ever

@llkamel9842 2 года назад

For a year i didnt understand this but now i get it thanks to you

@kayorihofschneider5379 10 месяцев назад

This was extremely helpful in my college course! Thank you for your time :)

@yashagarwal6723 Год назад

God level explanatory skills .... Hats Offf man.... Fan of you

@bsdiceman 5 месяцев назад

Thank you Khan Academy india!

@gabrielaochoa3875 2 года назад

Love this video. Thanks!

@sabbir.unofficial Год назад

How he expresses is top notch.

@sabbirh26 Год назад

As a commentary on current lead volts in capacitor, Existing video!😄 Well teaching, Thank u 🥰

@kevvonkev Год назад

beautifully explained! Thank you soooo much!

@secretg0302 3 месяца назад

Some one give him an award for love pf physics ,love u sir. ..

@physicsforallanniefreeda8909 2 года назад

Excellent 👍

@alexsong4433 7 месяцев назад

I went through 3 relative videos but still did not understand the thing, this one helped me out. Thank you for the nice present.

@sindobrandnew 6 месяцев назад

I think this lecture is the best among those on here, about the capacitor current lead. 😀

@rakeshkulkarni4323 2 года назад

Thanks man 👌

@klevisimeri607 Год назад

Amazing!

@debasishsahu3082 3 года назад

Very nice sir

@chamanlaldewangan6591 6 месяцев назад

Nice explanation. Thanks. It is helpful.

@factsss7 3 года назад

Amazing Outstanding Mind Blowing Fantastic

@saralvigneshwarradhakrishn4339 Год назад

Thanks bro for helping out in our concepts 🥰🥰

@navneethsajith6984 3 года назад

Superb 😄

@akashverma5756 Месяц назад

Suppose voltage on charged capacitor is V. Now, apply External electric field with voltage V across capacitor but in opposite direction to earlier voltage. Even if you connect two plates of charged capacitor with wire, there will be no current in wire because net voltage across capacitor is V-V = 0 but there are external voltage due to electric field. Now, vary this electric field sinusoidely .

@k.i.a.senaratne1401 Год назад

very interesting

@RSBot2jar Год назад

Thanks 👍

@roiforbes 2 года назад

I was trying to understand why the current leads the voltage from text books and couldn't. After the first minute or two of watching this video it was obvious! Thanks!

@llkamel9842 Год назад

Thank you so much again ❤️❤️❤️

@DarkImpulse18 5 месяцев назад

I can't stop laughing while watching this video even if I am in the library studying...love your videos man

@sonorousgaming7202 8 месяцев назад

Well that is exactly the rate of change. We can now say that current I is proportional to the rate of change of voltage V wrt time 😊

@Clickbait-ej1nh 2 года назад

Man i also want to be charged like capacitor

@RaviKumar-sw8dh 2 года назад

Finally i got answer of my question

@bijayalaxmi100 2 года назад

Yes me also

@montir4510 3 года назад

Thank u soooooooooo muuuuuuuccccchhhhhh sir

@sammalik6355 3 года назад

Mind blowing.... Flawless

@aryanraj441 3 года назад

superb explanation 👌

@sammalik6355 3 года назад

In the same manner explain lagging of current in inductor.... ..

@mohfa1806 Год назад

Thank you for your great educational lessons I have question please : i am confused how we can write : Vs= Vc knowing that the capacitor "gradualy" raise its voltage and doesnt respond instantaneously with the voltage source ! , why we are ignoring this fact and treating capacitor as if it is a resistor ? Thank you in advance

@netional5154 Год назад

Yes, my question exactly. Apparently the current is so high that the voltage across the capacitor is almost exactly in sync with the voltage of the power source. In that case the phrase 'current leads the voltage because the capacitor must first be charged' is not correct. It should say something like 'current leads the voltage because it's related to the difference in voltage which is maximum before the voltage peaks'.

@educationpower1823 Год назад

Where does the current come from.what triggers it to begin. What generates it and how 🤔

@yupppppppppppppppppppp5268 Год назад

Ac generator. I think he talks more about this in his lessons on inductance where he explains how the ac geneotor works.

@vaishnavi987 3 года назад

Waiting for all AC circuit videos!!

@b.srinivas9567 3 года назад

Super sir

@nothingbad8019 Год назад

DAMNNNNNNNNNNNNNNNNN

@vaishnavi987 3 года назад

Please explain power in AC circuits!!

@Dhyaneshwar-um6ln 6 месяцев назад

But why more change in voltage means the current should reach the maximum value? Edit: I get it, since the voltage change is maximum therefore the current it induces should also change by maximum, any other change is lower than the maximum change and hence current doesn't reach a higher value.

@ahmedsami194 Год назад

One second... When the generator voltage is increasing from zero,how the current is maximum? There is no voltage in the circuit there should not be a current.... I studied in Dinamo that when the voltage increase the current increase as the same

@Slovenija_patriot 18 дней назад

It's because change in voltage is maximum at 0V (the graph is the steepest) which means current must be maximum so that enough charge flows on capacitor and that it's voltage changes fast. When voltage reaches maximum the voltage change is the slowest which means the current doesn't need to supply as much charge to the capacitor. That's why current leads voltage on capacitor.

@yupppppppppppppppppppp5268 Год назад

Capacitors and current are kinda like sex. Someonetimes the partner wants to be filled up quickly and other times it wants it more slowley

@mynameis7964 2 года назад

Guys please keep the playlist in correct order its furstrating

@asmakhatoon6691 2 года назад

I am sorry but can you all stop complaining over a small things? Just search the topic up

@mynameis7964 2 года назад

@@asmakhatoon6691 oOoo

@jimjk7 2 года назад

It will be frustrating when you'll start paying for such content. Stop complaining.

@ratikantamahapatra8847 Год назад

But why we taking the Current on peak at 0 position? @ 0 position there is no current and voltage ....!!!!

@Slovenija_patriot 18 дней назад

Because at 0V slope of voltage is the steepest which means the voltage change is the fastest in that moment compared to when voltage reaches the peak when voltage is changing very slowly. Faster change in voltage means more current must flow to the capacitor. There's equation: ic = C * dv/dt