Cells, EMF, terminal voltage & internal resistance | Electric current | Physics | Khan Academy

EMF is the work done by the cell in moving a coulomb of charge across its terminals. It represents the energy transferred per coulomb to the charges. Some of this energy is lost as heat due to internal energy. Hence the net energy gained by the charge = the emf - heat lost. This net energy gained per coulomb is called the terminal voltage. This is the voltage across the ends of the battery.
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Donate here: www.khanacademy.org/donate?ut...
Created by Mahesh Shenoy

[@minervasanchez-tenorio3531]

Out of thousand of videos watched about this topic, you are the only one who knows how to explain this topic. Thank you!

[@samiddhajana8625]

Yes I am with you and please see this lecture by physics wallah he also explain this very well

[@HaSTaR2805]

@@samiddhajana8625 exactly..

[@gamingwithrksaver4868]

Same here

[@dear2664]

@@samiddhajana8625 hii, Can you tell me a place or video where i can understand why the electron moves inside the battery from +ve to -ve terminal. As on pw also there Respected Alakh Sir, quote HC Verma's word Battery Mechanism and himself said not going into detail. I wanna go in depth... Alright... This was all. Thanks.

[@samiddhajana8625]

@@dear2664 class 12 eletro chemistry.

[@anubhavsharma4714]

This is how Physics should be taught!! I was confused between them for a long time...but thank god I found your video.. thank you very much Khan Academy!

[@gloryprasanna9044]

ஷர்

[@VG__]

So practical, i would love to study entire physics if YOU are my physics teacher, literally ( not joking!) If You will teach me physics, I am ready to pursue physics as my career option🥺❤️

[@radhajha2931]

Same

[@earthilean9236]

Literally, i agreed with u buddy🥹 he is fantastic 😍

[@phlegmsmoothie]

I had like to see the face of this angelic voice who helped us

[@rumideka5485]

He is Mahesh sir he has his own channel in youtube 😅😊

[@mdinventions1763]

@@rumideka5485 what's the name of the KZbin channel please reply

[@HyperSpace588]

@@mdinventions1763 FloatHeadPhysics

[@pingu8394]

My textbook did an atrocious job at explaining this, but you have made it super clear! Thank you so much. 🌸🌸

[@rainsmush]

same Pingu ... textbooks are 👎

[@rayanalive2358]

SUCH AN UNDERRATED VIDEO! The explanation was comprehensive & intuitive, and hats off for being such an adept teacher!

[@dikshajain2778]

14:07 a whole lot! You are a great teacher sir. Explained everything like butterflow :)

[@physicshunt9563]

kzbin.info/www/bejne/rXypaIGrfrSkrsk

[@jays6430]

A very helpful Intuitive explanation of the topic. This helped a lot, thanks!

[@sultanmahmud7029]

Man what are you made of Simple things; many teacher blabbered in my life but nobody cleared the concept. Thank u man.

[@benedictprajwal8518]

I had trouble understanding this in online classes, You people helped me a lot, Thank you so much

[@kalaiselvanrajasekaran8352]

Love u r explanations man,and highly appreciating for the efforts you put to make us understand.

[@studyaccount8]

Mahesh sir and Khan Academy have had an incredible impact on my education and my life. Mahesh sir taught me with clarity and passion, while Khan Academy was my go-to resource for everything. As I move forward, I will carry their inspiration and lessons with me always. I am forever grateful to them. 🌟

[@doer.me99]

Many videos on this topic but it only this one where i understood. Thank you sir! Best Physics teacher with incredible content 🤩

[@rahulsingh.1582]

This is the best explaination of this topic forever Love your explanation 😍😍

[@treshanraoganni4682]

Honestly, i saw many videos on KZbin but this video and only this one has given me a lucid understanding of the concept. Heartfelt gratitude to you sir!

[@gamingwithshaurya470]

Teachers like you give us clear understanding of physics.

[@diyamehra6133]

I actually feeled what might be happening in the battery through this vedio And that was amazing 👍👍

[@hufflepuff4444]

EPIC EXPLANATION, SIMPLY EPIC. Thanks a lot, Sir!

[@shuchibarui2200]

This is incredible. Wow first time I felt like it's not phy but a story that got into my head right at the moment.

[@sandeepdas2639]

Thanks man this was a great explanation and I just loved the way this concept was explained.

[@sujathah.s1412]

I was finding a great problem with emf and terminal voltage but now it's crystal clear

[@dumbassmemer]

The only video where I actually understood the topic ... Thank you 😊

[@linanouman9545]

Cleared all my doubts. Thank you!

[@statuspiromen1364]

I dont know why students are watching alakh pandey and other unacedemy, vedantu. They dont know there is a genius channel khan academy. And really thanks sir for making a revolution in education

[@shanmukeshr1696]

True I truly have no idea what will they understand watching for 1 hr or so

[@vineet5701]

Pw lectures are extremely long and boring..

[@statuspiromen1364]

@@vineet5701 yeah bro

[@statuspiromen1364]

@@vineet5701 khan academy lecture are fully based on concepts and ideas

[@vineet5701]

@@statuspiromen1364 khan academy has concept based lectures...

[@uvaanstree854]

You should deserve a million like for this effort :)

[@arsheenzahid1972]

Finally I've watched a perfect explaination on this topic it's so confusing for me but I'm glad now my doubts are almost clear 🙂thanks

[@sarveshjaiswal5220]

10:57 you say the terminal voltage drops I say the mic drops Respect 💯

[@rainsmush]

💯

[@Kalkidan-kv6mz]

I don't have any word to tell about how much I am admired you becouse of your interseting detail video

[@habibououmarou9791]

My friend, this is totally different, I wish you were my teacher when I was in high school. really awesome. Thanks a lot.

[@gamingwithshaurya470]

Such an underrated video this video give us clear understanding of voltage EMF but sir if please make a video on how is potential difference created inside a cell

[@md.khorshidalam2164]

Really a great video !!! You taught it very well,saw a lot of videos but never understood the topics that clear ...............So, thanks for being here .

[@bitishajana4619]

Incredible explanation! Simple and very effective.

[@gyroscope6078]

It is beyond of my expectations, great video.

[@rumours.9508]

I'm speech less ,you're the one my best tutor in my way thanks for your process and thoughts to do this great job without any bubble reputation

[@namesake5344]

Just assuming this channel will now continue with its videos post elon musk huge 5 million dollar donation to khan academy recently 🤗🤗🤗🤗🤗🤗🤗🤗

[@harshsingh6251]

Thanks, you made it so easy to understand.😁👌even a class 2 student can understand it easily

[@shafiajabeen9785]

Was just studying this!!

[@imonsanyal]

I like the fact that he gives more importance in your explaining the concept not the derivation.

[@nmgaming999]

Thank you for the amazing video... it made my concept more clear..

[@leethathomas9320]

This video saved my life...Honestly...I watched many videos but this one.I don't have words

[@ch.uma1927]

It's just not clear, it's crystal clear Thank you soo much for this extraordinary explanation sir...👏👏👏

[@Surendiranerd3886]

This helps a lot thank you I was wondering what was going on when this was taught in class this certainly helps me thank you

[@swastithakur4363]

Sir thank you for this lucid explaination, you are an incredible teacher ,sir we all aspire to be like you

[@sakumieika]

OMG! so clear! Thank you so much!!

[@factschool7868]

Thankyou sir for clearing my concepts

[@h49453]

No words for your wisdom 😀

[@mewechawoldu3649]

Wow!! I have never see like this explanation. Thank you!!

[@marjanamajeed8861]

u r such a gem🔥

[@saleemashajahan7660]

Such a clear explanation 🧡

[@narendrajoshi7380]

Wow such a wonderful explanation. And I clearly understand that.

[@khushithemasti2991]

Woww ! Mind blowing...I just kept on reading and remembering this topic but after watching this video I can understand everything and relate to the definitions and text given in the book...Oh my goodness, thanks a lot !

[@shujamukhtar4563]

brilliant as always

[@mohamedmusthafa814]

Really understandable. U really are a great teacher!

[@AbdulHamid-uw2oe]

Awesome...very nice... Clear all of my confusion...

[@thippeswamysidegonde5525]

Thankyou for running out the confusion out of my mind 👍🏻

[@samanfatima917]

Tnq so much for such an easy explanation ✌✌just love it and u made the topic easier for us

[@altabrza8658]

You have imagined me the whole theory in my mind. thank you sir

[@335haan5]

tysm for making this video, really cleared my doubts

[@shreyasvempala657]

Literally watched 5 videos of this topic and this the only one that made me understand the concept till depth.

[@cavelinguam6444]

Reallly awesome explanation.

[@floralawrence9927]

May God Bless you Words can't explain how u have helped me

[@ankit__9827]

The best explanation!!!

[@SambridhTheZenith]

Beautiful video, Thanks Boss.

[@user-kq3hg6wn1k]

very efficiently explained!!

[@mohiteharsha8009]

What an wonderful explanation hats off to u sir

[@ahmadaref200]

Let me say that it was a MIND BLOWING video… just as always ;)

[@samarthvyas8195]

The only video that helped me understand this topic after watching many

[@souvik610]

Amazing explanation, thank you very much.

[@jvalinrajpurohit8051]

very very nice video please don't stop making this type of videos

[@ishikamukherjee8152]

You are the best teacher ever! Thanks a lot, sir.❤

[@vishali309]

This video deserves a lot than others !!! ✌🌟🔥 Thank you sir, I have been confused in this topic from my academic year, now it's crystal clear !!

[@karenarcos4505]

Great explanation, thank you so much

[@vinaychandra3768]

Wahhh!!!!!!! Wahhhh!!!!!!! Really, u r great!!! Wonderful explanation sir!!!👍

[@Nuna-hx5ek]

I am very grateful for your detailed explanation 😊

[@devotioadorat313]

Khan academy is soo underrated 😫

[@kidd1769]

Makes so much sense!!!!

[@-SAMBHAB-7169]

Nice explanation, appreciated,💓

[@M.M.T109]

Superb from Pakistan 🇵🇰🇵🇰🇵🇰

[@bhawnasaxena3229]

Crystal clear✨ To the point Veryy nice✌🏻

[@shrushh2007]

Dudee u just cleared topic in 14 min and that to crystal clear❤ thanku

[@ganeshraja1789]

Excellent...thank you

[@premlathasalian2404]

One of the best explanation on this topic

[@doseoffaiyaz]

Best video on the topic hands down!

[@labanya_jm]

Well explained, thank you ❤

[@mbarakmahmoud2150]

Honestly speaking...it's the best of explanation.

[@dhanalakshmiprakash8784]

Thank you so much 😊... Great explanation...

[@shameemab6258]

How easily i got to know about this topic super easy!!! Really very thank full 😊 to u

[@vasanth2259]

mind blowing explanation...

[@eshasaroya6825]

Really helpful 👍

[@anishatadkod1778]

This person is just super amazing 😍!

[@KrishanKumar-zq8jn]

I really really really loved the video sir. U are gr8 totally able to clear my and most of others doubt

[@kanchanthakur7428]

You are best! Thanks for superb content

[@sameeksha6504]

Loved it!💫

[@bulbergaming9142]

thanks a lot.This really helped me clear the doubts😍

[@vahagnmelikyan2906]

I like your video. You take the time to explain slowly. My brain doesn't catch up too quickly.

[@maltasankar927]

Crystal clear explanation 🎉🎉

[@keep__laughing]

Great sirji 😃 nobody can explain like u

[@altabrza8658]

I love your way of teaching 💕💕💕

[@munaakter1892]

Loved this video...😍😍

[@soniamariamthomas264]

you nailed it!