I have been confused with voltage and potential energy since the start of the semester, I had read books, watched a lot of videos and tried to pay attention in class but nothing had really helped until I watched this video. Thank you so much!
This is perfect. So many UA-camrs ranting on about irrelevant crap that just confuses you even more. This is so clear and I finally understand this idea of potential difference! Thank you.
Dude I still could not understand how potential difference is needed to have a continuous flow of current because it is about TRANSFER OF ENERGY AND how is that connected to a continuous file of current?
I would have probably gone mad with the vague definitions in the textbook as I HATE learning stuff I don't understand! Thank youuuu for your selfless video! Love u khan academy 😊😊😆
Finally understood what teachers, professors and books have been trying to explain me. This channel is hands down the best thing that has ever occurred to me on internet
As soon as I hear this guy voice I convinced my self to learn new thing. My Teacher is so boring a think he haven't good coarse about this concept and I told him to follow this guy. Thanks a lot mahesh your student from Ethiopia, East Africa.
I am not going to lie here, buy this teaching in way far better than any other vids that I have seen explaining this concept mainly because of that kids slide drawing.
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
@@jibankrishnamuhuri5518 I think if come to reality the charge will actually loose potential energy by moving as it convert into heat energy , so if they keep moving they will loose some potential energy and ultimately before reaching the battery of the negative side it will loose its potential energy and they regain . That's why when you connect a circuit without a load it loses some potential energy not all but some and it regain the energy through the battery
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
Since energy can neither be created nor destroyed ,what about the kinetic energy of positive charge .Are we neglecting it against heat loss? Bcz we r considering complete potential energy supplied by battery going in heat loss in bulb then what about the movement of charge in wires and bulbs. Plz explain sir.
Using his analogy one could have been more succinct. If mgh represents gravitational potential energy (PE), Voltage is analogous to the "gh" bit or gravitational acceleration x height in the direction of acceleration. In electricity gravitational acceleration is represented by electric field E (which also is acceleration) and height by d (displacement) along the E direction. Just as multiplying gh by mass = mgh (gravitational potential energy) so multiplying Ed by q = qEd = electrical potential energy. The "Ed" bit is also called Voltage or EMF. Thats it in a paragraph Recapping, gh is analogous to Ed or Voltage or EMF or "POTENTIAL". Multiplying with q gives Potential Energy (PE)
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
@@jibankrishnamuhuri5518 No, I guess there will be no loss or gain of energy...it's because an empty glass can be filled when it becomes empty If here, the bulb is not connected the battery will get the electrons already having enough potential energy...so no loss or gain of energy I am not sure whether it's right or not but hope this only the logic behind it....
So if the voltage drops to zero after passing the resistor, then what's pushing the electrons to move toward the terminal of the battery? Can someone explain this, please?
I think the direction of the flow of electrons is wrong here cause electrons would always flow from negative terminal to positive terminal and current flows in the direction opposite to the flow of electrons. Any one correct me if I am wrong.
yes, it was mentioned in the video. for simplicity we are taught with the direction of protons as their direction is considered the direction of electricity. Once watch the video again.
Again, What made the electron move from the positive pole to the negative pole ? is the poles themselves or the chemicals that push them or the difference between their potential energy ?
Hi! So first up the electrons DONT move from positive to negative pole but the other way round, that is from negative to positive. Also, the chemicals inside the battery are generating energy which act on the electrons to make them move across the circuit.
Sir,in the example with potential difference of 1.5 V, what if there was no bulb, then positive charges will still keep on flowing from positive side to negative(i.e:electrons will keep on moving from negative to positive side of battery).But there wouldn't be any resistance as per our assumption, so no heat will be generated.Then will it still do 1.5 J work/coloumb?
If electrons start going through wire it will start accelerating so its potential energy will converts to kinetic energy so how come potential difference is zero?
At 11:58 u said that in physics whenever we lose energy we do work, but when we push wall, we transfer energy to wall but no work is done as work is fdcostheta.
You are right, technically that statement isn't very accurate - thanks for pointing it out. It works as long as we are talking about mechanical energy (kinetic/potential). You can transfer heat without doing any mechanical work. In your example, your chemical energy is converted to heat.
@@KhanAcademyIndiaEnglish Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
I made a video just for that www.khanacademy.org/science/in-in-class-12th-physics-india/x51bd77206da864f3:alternating-current/x51bd77206da864f3:transformers/v/transformer-currents-energy-losses-intuition?modal=1 Would love to know if the video helps!
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
There are negative charges in the wire and if they gain potential energy the negative would try to repel other negative charges and in order to do that they would apply force on the other charges and the other charges would repel and move and so the work is done and if the work is done there would be some loss of energy so how there potential energy does get reduced
for electric circuits wherein there are no electrical appliances like bulbs or a fan, there is still a potential difference. In this case, where is the energy being lost?? Because electrons are simply flowing from one point to another?
For creating the electric current motion, you explained that positive terminal of the batery pushes the charges away from them, and the negative terminal of the battery pulls towards it. I understand that, but what if instead of having a negative terminal we have another positive terminal but "more positive"? I think there will still be a potencial difference because the charges of the terminals will be different, but, will both positive terminals push the positives charges away from them? (sorry for my bad english)
In that case, the "more positive" terminal will push with stronger force than the other terminal. Hence it will end up pushing the charges away. But I am not sure if in reality such a battery exist :)
As soon as I hear Mahesh Shenoy's voice, I smile and know that I'm going to have some fun while I learn. Good job.
you can hear him smiling and laughing, being genuinely excited about what he is teaching
Sme I also feel
awesome
The same😊
Same... I love his channel flothead physics
I have been confused with voltage and potential energy since the start of the semester, I had read books, watched a lot of videos and tried to pay attention in class but nothing had really helped until I watched this video. Thank you so much!
This is perfect. So many UA-camrs ranting on about irrelevant crap that just confuses you even more. This is so clear and I finally understand this idea of potential difference! Thank you.
Dude I still could not understand how potential difference is needed to have a continuous flow of current because it is about TRANSFER OF ENERGY AND how is that connected to a continuous file of current?
I would have probably gone mad with the vague definitions in the textbook as I HATE learning stuff I don't understand! Thank youuuu for your selfless video! Love u khan academy 😊😊😆
Finally understood what teachers, professors and books have been trying to explain me. This channel is hands down the best thing that has ever occurred to me on internet
Agreed
Your teaching is God's gift for me and also other students. 🙏🙏
Amazed again , I'm not surprised.
The best video on entire UA-cam regarding Voltage and Electric potential ❤❤❤
The best explanation I've ever got on this subject matter. Thank you for this!
No one never explain like this
You are concept builder 👌
As soon as I hear this guy voice I convinced my self to learn new thing. My Teacher is so boring a think he haven't good coarse about this concept and I told him to follow this guy. Thanks a lot mahesh your student from Ethiopia, East Africa.
I am not going to lie here, buy this teaching in way far better than any other vids that I have seen explaining this concept mainly because of that kids slide drawing.
My biggest unknown concept is cleared only by u.thanks a lot.🤍🤍
Great explanation ever😎
Startled by your way of teaching 😊
Good job 👍
You are the best explainer of concepts.
The best explanation till now!! Thank you
literally understood so well I could cry
Yah, I WASTED 1 WEEK ON THIS!
Mah physics teacher so bad I could cry. Khan Academy saves the day.
Nice
Excellent explanation. I wish I had heard you before , so I could have taught my students in this way. Now I will use this method. 🙏
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
@@jibankrishnamuhuri5518 why did I saw your question now I am even confused
@@jibankrishnamuhuri5518 I think if come to reality the charge will actually loose potential energy by moving as it convert into heat energy , so if they keep moving they will loose some potential energy and ultimately before reaching the battery of the negative side it will loose its potential energy and they regain . That's why when you connect a circuit without a load it loses some potential energy not all but some and it regain the energy through the battery
@@Jaiyaxhkateacher question is valid or not ?
@@jibankrishnamuhuri5518 mean
Omg This is So facilitated I would've never understand it this clear 😊
Genius explanation sir thankyou so much!!
Pretty much covers all the stuff regarding potential difference. Very detailed thx 😁
The best explanation ever !! And I still wonder, how come this channel is underrated ?
The best explanation everrrr!!!And I mean it
Wonderful finally my concepts are clear!!
No doubts left.....
Now...clearer than before....thank you...mahesh🎉🎉🎉
amaazing finnally a lecture that explains it properly
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
That person who keeps lifting them is EMF or Electro Motive Force
than whos the voltage
@@Afridi-Ahad it's the work done per coulomb of charge
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
Your teaching super and easy to understand
I truly love your channel. Keep doing the best work.
I am teaching this topic and this will help a lot 👍
Best explained.
The best explanation i found... U need more likes
Great video. Sir! I really love the way you explain.
Just keep making great videos.
Superb explanation.Thank you for the service.
Thank you sir and I 2ould like to have such understanding vedios
this was very easy to understand! thank you for your hard work~
this finally made all my concepts so clear... thanks a lot 🙏
great explanation sir. Thank you so much 🫶
Best explanation sir .i like your voice sir
Woow
Even ad a physics teacher
I just happen to be learning potential difference all over ....what are they teaching in text books for heaven's sake
It's really the best explanation
can u plzz explain tge electrochemical process inside the cell? which prvide the energy to the +ve charge
Best explanation ever!!!! Thanks a lot!
You really amazing 🤩🤩🤩
Thank you
Great × 100000000000000000000000000000000 times
I have been saved by an Indian guy on youtube thank you
totally understood the concept by ur amazing teaching sir🙃
Amazing, Great job man
Since energy can neither be created nor destroyed ,what about the kinetic energy of positive charge .Are we neglecting it against heat loss?
Bcz we r considering complete potential energy supplied by battery going in heat loss in bulb then what about the movement of charge in wires and bulbs.
Plz explain sir.
Thanks a lot👍👍brilliant teaching
Great video!
The best explanation ever🙏🏻🙏🏻🙏🏻
Using his analogy one could have been more succinct.
If mgh represents gravitational potential energy (PE), Voltage is analogous to the "gh" bit or gravitational acceleration x height in the direction of acceleration. In electricity gravitational acceleration is represented by electric field E (which also is acceleration) and height by d (displacement) along the E direction. Just as multiplying gh by mass = mgh (gravitational potential energy) so multiplying Ed by q = qEd = electrical potential energy. The "Ed" bit is also called Voltage or EMF. Thats it in a paragraph
Recapping, gh is analogous to Ed or Voltage or EMF or "POTENTIAL". Multiplying with q gives Potential Energy (PE)
Excellent explanation
Thank you very much
Nice explaination😯
Thanks a lot sir 🙏 ❣
You nailed it
Now .I'm obsessed with physics.... thank you so much..☺️☺️☺️☺️☺️
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
@@jibankrishnamuhuri5518 No, I guess there will be no loss or gain of energy...it's because an empty glass can be filled when it becomes empty
If here, the bulb is not connected the battery will get the electrons already having enough potential energy...so no loss or gain of energy
I am not sure whether it's right or not but hope this only the logic behind it....
im crying I love youuuuuuu thanks a lot
I really love your videeo and I wish you will make videos on physics topic as much as possible
What a superb explanation 👌👌👌👌
as long as u guys are here there is hope alive in us.... genuinely speaking
OH thank you for making this understandable without another hose analogy!
And why is always explained with the ONE thing you do not want to mix with electricity?
So if the voltage drops to zero after passing the resistor, then what's pushing the electrons to move toward the terminal of the battery? Can someone explain this, please?
I see It cannot never be zero as it just lost what it gained but still have its main potential
I think the direction of the flow of electrons is wrong here cause electrons would always flow from negative terminal to positive terminal and current flows in the direction opposite to the flow of electrons. Any one correct me if I am wrong.
yes, it was mentioned in the video. for simplicity we are taught with the direction of protons as their direction is considered the direction of electricity. Once watch the video again.
Your vids help me alot thanks alot for them
Sir, I think the current moves from the negative terminal to the positive terminal. I don't know that you are wrong or I. i am really confused??????🤔🤔
Hello, what about the kinetic energy of the charges moving? Isn't there energy lost through the wire?
Thank you!
Exactly my question.
this is best explanation ever
You are the best thanks
Again, What made the electron move from the positive pole to the negative pole ? is the poles themselves or the chemicals that push them or the difference between their potential energy ?
Hi! So first up the electrons DONT move from positive to negative pole but the other way round, that is from negative to positive. Also, the chemicals inside the battery are generating energy which act on the electrons to make them move across the circuit.
Whoa... What an explanation..⚡⚡
Sir does potential energy of charge convert into kinetic energy?❤
Thanks for the crystal clear explanation
Sir,in the example with potential difference of 1.5 V, what if there was no bulb, then positive charges will still keep on flowing from positive side to negative(i.e:electrons will keep on moving from negative to positive side of battery).But there wouldn't be any resistance as per our assumption, so no heat will be generated.Then will it still do 1.5 J work/coloumb?
Exactly i m thinking the same ...did ypu get the answer?
You are a great teacher,thank u
Thanks a lot for the very good video!
If electrons start going through wire it will start accelerating so its potential energy will converts to kinetic energy so how come potential difference is zero?
At 11:58 u said that in physics whenever we lose energy we do work, but when we push wall, we transfer energy to wall but no work is done as work is fdcostheta.
You are right, technically that statement isn't very accurate - thanks for pointing it out. It works as long as we are talking about mechanical energy (kinetic/potential). You can transfer heat without doing any mechanical work. In your example, your chemical energy is converted to heat.
@@KhanAcademyIndiaEnglish Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
Perfecto ! 👏👏🙏
God bless you sir.. 🙏🙏🙏🙏🙏
No one explain potential energy better than u sir
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
10:38 but in reality it loses stored energy and converted to heat right sir
Then how the potential difference between the two points becomes 0 🤔
Please do a video on transformers.
I don't get how current decreases when voltage increases in a step up transformer.
I made a video just for that
www.khanacademy.org/science/in-in-class-12th-physics-india/x51bd77206da864f3:alternating-current/x51bd77206da864f3:transformers/v/transformer-currents-energy-losses-intuition?modal=1
Would love to know if the video helps!
@@KhanAcademyIndiaEnglish It was simply WOW
@@KhanAcademyIndiaEnglishIt cleared all my doubts and thanks a lot for giving this awsome knowledge.
Can u tell me if i connect only a wire to the bettery ..no bulb is involved ... then the electrons won't loss any energy..then what will happen?..electrons will continuously gain energy while passing through the bettery...?... confuse
What happen if we connect negative terminal of a battery with positive terminal of another battery?will current flow ?
hey, we were taught as potential difference is the electric pressure difference between 2 terminals of a cell. Can u just explain it?
Fantastic....
Amazing
Thank you SO MUCH!
this is brilliant!
best video on volt
works even for collage students!!
Thanks for this video
There are negative charges in the wire and if they gain potential energy the negative would try to repel other negative charges and in order to do that they would apply force on the other charges and the other charges would repel and move and so the work is done and if the work is done there would be some loss of energy so how there potential energy does get reduced
for electric circuits wherein there are no electrical appliances like bulbs or a fan, there is still a potential difference. In this case, where is the energy being lost?? Because electrons are simply flowing from one point to another?
Seems you havnt read properly what an electric circuit is. Even in a conductor, charges always face resistance, though it might be very small.
For creating the electric current motion, you explained that positive terminal of the batery pushes the charges away from them, and the negative terminal of the battery pulls towards it. I understand that, but what if instead of having a negative terminal we have another positive terminal but "more positive"?
I think there will still be a potencial difference because the charges of the terminals will be different, but, will both positive terminals push the positives charges away from them? (sorry for my bad english)
In that case, the "more positive" terminal will push with stronger force than the other terminal. Hence it will end up pushing the charges away.
But I am not sure if in reality such a battery exist :)
I love you Khan academy
Thankyousomuch sir!
This guy is a literal Gigachad