What is RMS value? (& why should we care?) | Alternating currents | Physics | Khan Academy 

The teaching skill he has is insane ..... Understood clearly

Many of them have knowledge but how beautifully you have served it is rare....Seeing things out of the box and showing different perspective of what exactly happening is a real achievement of gaining knowledge and I felt that today....Thanx....Please keep making videos world need such kind of teachers...I have never ever commented but today was unable to resist myself after seeing few of your videos, you have explained so nicely I am really thankful to u.....

The kind of explanation that puts smiles on students' faces. Thank you

Sir, you are THE BEST teacher ever. You have helped me a lot. Pls keeping making such videos. ❤️❤️

wow,the quality of teaching is good ! I really felt joy while watching this video,thank you sir!

i often to say that who is watching and learnng the concept will be genious one day❤you had made science very intresting.... i didnot get tried in each minute..your 13 minute video is equal to alkah sir 1 hr video

Holy shit, my teacher had taught a whole lesson on this, more than 1 hr, still not a single clue until this guy showed up with just 12 mins

You explained where this RMS thing come from which is rare, so thank you 🎉

The best and most effective explanation ever seen for anyone who is not interest into complex Maths rules to obtain an understanding. Well done

Sir you are just amazing!!!!!...I don't know how to thank you ...you are the best physics teacher I have ever met !!

I didn't get a chance to learn what rms really was except that it's relatated to some max value. Mahesh, you have a talent for explaining tough concepts in such a simple way. Another video of yours that come to mind is "Why resistors in series have different voltage (but same current)?" from FloatHeadPhysics. I struggle with learning about electricity but wow do I enjoy watching and rewatching your videos. Its so intuitive that I just want to share this knowledge with others. Thank you so much for your efforts, it has helped me greatly!

Like seriously we have been thought something wrong , I have studied same thing and come to my 2nd year of engineering and now I realise the truth.

Thank you so much! This helped a lot!

Truely Awesome Explanation. I got this by using mean value theorem for integrals.

Thanks for sharing. It’s the best explanation

Excellent video…. I was wondering who made this so well then realized it was khan academy… I should have guessed. Only Kahn academy makes videos this well

This guy!!!!! Maaaaaan !!!!! You just can't be that good

Waiting for this video eagerly sir.

Super presentation sir Thanks for giving a nice explanation for rms value

This is so good !!!! Thank you Sir

You clear concepts perfectly.

I highly appreciate your teaching method and skills

After 35 yrs now I understand RMS thank you

Best explanation on youtube, good sir. BIG LIKE!

I Usually Never Comment....But..Man You Just Made That Way Too Interesting💀

Really great full sir learning with you. Maximum when i get doubt in electrical straightly I find your lectures to learn concepts clearly.

Please universe bless Khan academy's teachers with only good things

So clear!

brilliant explanation!!! thank you!!! top job!!!

Sir,now i got an idea what truely the RMS value was.thank you so much sir and keep making such videos .

Physics wizard✨

Concept crystal 🔮 clear.

Thank you so much for your very easy to understanding explanation.

Such a determined teacher❤

Thanks for the excellent lecture!

Best teacher till now in my life time ,i m big fan n student of yours

You are an outstanding teacher! Thank you

Love your video

Thanks a lot sir!!!

thanks a lot..

Thanku for give RMS of this knowledge

YOURE A GEM. 👐😭

This is great

Thank you sir 🙏

Great job

Well explained

Great Job

First view sir

thank u very much

This man body is filled with electrical networks so that he know very well abt every topic related to electricalm. 😅❤

Thank you 😊

U have made my day

great video

Very thank you

Wow, this guy is so good! I want more videos by him!

Thanks

This is called real method how to teach physics its meant to be fun

Awesome

Outstanding

amazing video✌

too good

Best explanation

I love this channel

Plz use simple english help also other students as u teach very good

You are God...😇

👌🏻👌

I Sir, Your videos have helped me

Link to the next video?

❤

Current in a resistor is a start-stop motion of conduction band electrons due to their collision with the rocking lattice ions, and this causes a resistor with a sinusoidal voltage applied, to produce heat. The polarity reversals of an applied sinusoidal voltage (with the direction reversals of the applied electric field) do not affect electron collisions with the lattice ions. Electrons colliding with lattice ions from either direction will continue to produce heat and there is no cancellation of the heat developed! Mathematically, the average value of a sinusoid is zero, and so, the average value of the current will also be zero. The average values cannot therefore represent the heat developed in a resistor with a sinusoidal current. A resistor cannot develop heat due to a current in one half-cycle and then cool itself by a like amount of heat during the next half-cycle! It develops heat either way whether the current is positive or negative. The lattice ions vibrate from collisions irrespective of the directions in which the electrons collide with them. Therefore, since the average value is zero, it necessitates the use of the root-mean-square values of the voltage and current to compute the power, which is a statistical measure of the magnitude of a varying quantity and is the square root of the arithmetic mean of the square of the sinusoidal function. Electrostatics and circuits belong to one science not two. To learn the operation of circuits it is instructive to understand Current, the conduction process, resistors and Voltage at the fundamental level as in the following two videos: i. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-TTtt28b1dYo.html and ii. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8BQM_xw2Rfo.html It is not possible in this post to discuss in more detail average and rms values. The last frame References in video #1 lists textbook 4 which discusses in detail using a unified approach sinusoidal voltage, current, their average and root mean square values.

But not for every sinusoidal current right ? 11:06 I mean when phases are varying ?

if we have a value maximum current, then what would be greater i(dc) or i(rms) ?

Sir why should we have to equalise power of DC bulb to that of AC bulb

Fluctuation of bulb is 50 times or 100 times per second? 1 cycle is equal to 2 times fluctuations?.....watched ur previous video in which u described frequency and no. of times alternating current changes direction.

BUT then what is significance of average current ?

Sir I have a question if we take two sin waves in same graph with x axis as radians, here one is sinx and other is sin(2x) . Then as they say the complete cycle takes only (2phi)radians. Then for sin(2x),it takes less than (2phi) to complete one cycle if we see in graph because more frequency ??

I hate when physics makes me smile

I wish there was a way to like twice😅

So what is the efficiency of this way of representation sir

I watched twice and still didn't catch it. What is this N value that I am dividing by?

Rms value in real life in our home, especially for eb bill Are we dissipating more power and only giving less money because they only take the rms value

Damn got more. Confused wtf Ac or dc bulb duh

Isn't the fluctuation happening 100 times per second?

🌃nightmare

يخربيت حلاوتك يا جدع

Physics wizard✨

❤