Cells, EMF, terminal voltage & internal resistance | Electric current | Physics | Khan Academy
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- Опубліковано 20 січ 2021
- 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.
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Created by Mahesh Shenoy
Out of thousand of videos watched about this topic, you are the only one who knows how to explain this topic. Thank you!
Yes I am with you and please see this lecture by physics wallah he also explain this very well
@@samiddhajana8625 exactly..
Same here
@@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.
@@dear2664 class 12 eletro chemistry.
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!
ஷர்
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Same
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@@mdinventions1763 FloatHeadPhysics
@@mdinventions1763 floating head physics
SUCH AN UNDERRATED VIDEO! The explanation was comprehensive & intuitive, and hats off for being such an adept teacher!
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same Pingu ... textbooks are 👎
Man what are you made of
Simple things; many teacher blabbered in my life but nobody cleared the concept.
Thank u man.
14:07 a whole lot!
You are a great teacher sir. Explained everything like butterflow :)
ua-cam.com/video/wKF7NuIOqxg/v-deo.html
A very helpful Intuitive explanation of the topic. This helped a lot, thanks!
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. 🌟
10:57 you say the terminal voltage drops
I say the mic drops
Respect 💯
💯
Honestly, i saw many videos on UA-cam but this video and only this one has given me a lucid understanding of the concept. Heartfelt gratitude to you sir!
I had trouble understanding this in online classes, You people helped me a lot, Thank you so much
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And really thanks sir for making a revolution in education
True I truly have no idea what will they understand watching for 1 hr or so
Pw lectures are extremely long and boring..
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I actually feeled what might be happening in the battery through this vedio
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Teachers like you give us clear understanding of physics.
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Cleared all my doubts. Thank you!
EPIC EXPLANATION, SIMPLY EPIC. Thanks a lot, Sir!
Happy teacher's day sir
The only video where I actually understood the topic ...
Thank you 😊
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
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My friend, this is totally different, I wish you were my teacher when I was in high school. really awesome. Thanks a lot.
I was finding a great problem with emf and terminal voltage but now it's crystal clear
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 .
Thanks man this was a great explanation and I just loved the way this concept was explained.
Was just studying this!!
Superb from Pakistan 🇵🇰🇵🇰🇵🇰
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It's just not clear, it's crystal clear
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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
OMG! so clear! Thank you so much!!
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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
Excellent explanation...
I finally came across the real meaning of these terms. After watching hell lot of videos, I can confidently say that this one was the best✨ Thank you!!!
I like the fact that he gives more importance in your explaining the concept not the derivation.
Thankyou sir for clearing my concepts
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 !
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Such a clear explanation 🧡
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tysm for making this video, really cleared my doubts
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Crystal clear!! ⭐ Thank you sir ❤
The charge can be negative too right? Using which he explained EMF?
The only video that helped me understand this topic after watching many
The best explanation!!!
Thank you!
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Crystal clear✨
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Literally watched 5 videos of this topic and this the only one that made me understand the concept till depth.
Best video on the topic hands down!
in parallel circuit voltage remains same right so why will the bulb glow less brightly as you told in the beginning?
In parallel circuits the voltage across the batterry and the resistors is the same, but it does still get reduced as we add in more resistors in parallel (because more current = more heat loss = reduced terminal voltage).
@@jax1296 ahh yes thank youu!!
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