I'm upset that my education sometimes relies on professors who have phDs, but they don't know how to convey a message across to their students. They are smart, but cannot teach. I need to pass Physics to graduate and I am glad these videos are here to help me to do what my professor can't.
It always amaze me how some of these random videos are able to clearly explain topics in about 10 mins but a two hour lecture for the same topic will have me lost beyond belief.
Its not their fault the great professors are not involved in text making. The low level beginners are involved in this. Just like the doctors in a higher position won't work much instead the medical students are writing the medicines for the patients.
You have several fundamental rights to access this video: Freedom of association, freedom of speech and listening, freedom of choice, just off the top of my head. What you don't have a fundamental right to is the labour of others; So find a way to power your computer and connect to the internet, freedom begins from there.
This single video is without a doubt the standard to which all education should be set- the clarity of something that can be so confusing in text or lecture astounds me. Thank you Khan Academy for everything you give students
I, too, had a brain explosion. Still picking up the pieces. If I was a woman, I would find this man and marry him. Heck, I am a man and I want to find him and marry him.
This is a deadly most wanted technical clearance ever in physics. I was so confused with potential and potential energy and the work done related to them. Now it is clear. I appreciate it very much.
Our physics book says a lot of things to make physics look fun, but at the end of the day they took all the important stuff out. Thank you very much for the video
I agree. Most authors don't teach these basic things to the bones like they should be, instead they choose to skip these important fundamental steps and replace them with meaningless fancy images instead.
You have no idea, I've been struggling with this concept for so long and I finally get it I just needed it broken down like that! Amazing teacher thanks for the video.
This is the best explanation of potential,i have watched numerous amount of vidoes on it and every video left me confused in some or other way but this is the best ans simplest explanation ever.
This may seem obvious to many but watching this masterpiece was the first time I actually realized that electric potential does NOT follow the inverse square law!
It was this simple... why did I attend a 1 hour lecture to gain 0 knowledge when I could have just watched this 11 minute video and actually learn the topic...
Thankyou very much...Was really confused with the topic...I am able to visualise and grasp the logic behind these terms...😊 It was a wonderful and clear explanation!
After a long search, I decided to watch this video to see what the fuck Electric Potential was so I wont fail my midterms tomorrow. And I'm glad I did, not only does it explain WHAT this is, but it also explains where the formulas for this come from. Thanks a bunch!
man this was like a God sent. our professor glossed over this so hard. It seemed like it was much simpler in class but I was not getting it. thankfully there are people like you out there who can relate and actually tell us why we care about this concept. Thank you
Electric Potential of a charge Q, V=k*Q/r Units: [J/C] - Can be positive or negative depending on charge. - Electric Potential Energy = V*q = k*Q*q/r ; Units: [J] (or electric potential energy of a body of charge q placed at point in electric field of charge Q at distance r, will be: KQq/r ) (Def. Electric potential energy of a body at a point in an electric field of another body is defined as the amount of work done in bringing the given body from infinity to that point without acceleration.) Gravitational Potential of a mass M, U=GM/r Units: [J/Kg] - Always negative. - Gravitational Potential Energy = U*m = G*M*m/r (or gravitational potential energy of a body of mass m placed at point in gravitational field of mass M at distance r, will be: GMm/r ) (Def. Gravitational potential energy of a body at a point in a gravitational field of another body is defined as the amount of work done in bringing the given body from infinity to that point without acceleration.)
Believe it or not, a moving magnet may also generate an electric potential, but such an electric potential depends not just on the position of the magnet but also the velocity of the magnet. Source: "Electromagnetic interactions derived from potentials: charge and magnetic dipole" by Roberto Coïsson
I came across electric potential defined as the amount of work needed to move a charge q to some distance r against(?) the direction of the electric field; hence, V = Er = (kQ/r2) r = kQ/r
10:38 the difference in electric potential results in voltage....It is confusing me...Coz the units also don't match...The remaining explanation was the best i could get
At 1:05 you say the V value at any point without any charge around, would be zero. This makes sense. Then at 1:20 you say to make any point have a V value that is non-zero, all you have to do is place a charge at any point. Then at 2:15, you say if this point (bottom left corner) happened to have a V value of 100 joules/coulomb. This contradicts the comment at 1:05 where you say a point without a charge would have V = 0. But at 2:15, you are referring to a point that doesn’t have a charge (no coulombs) and instead of V = 0, this point has a hypothetical V value of 100 joules/coulomb. How could this point have a V value even though there isn’t any charge at this point?
I dont see a problem with Electric potential energy. It is not abstract. It is indeed a potential energy per unit charge. By convention consider a small positive unit test charge and release it near a large distriibution of positive charge, that test charge has a potential energy that will be converted to kinetic energy as the repulsive force from the positive charge distribution drives it out. The kinetic energy it finally acquires is = its original potential energy and that potential energy divided by the test charge is called its PE per unit charge, or electric potential.
Bonjour est-ce que cette vidéo existe en Français , c'est la seul notion que j'ai du mal à comprendre (le potentiel Electrique ) et qui est en anglais, si on ne maîtrise pas l'anglais c'est difficile de bosser sur un sujet dont on a déjà un peu de mal , merci .
I'm upset that my education sometimes relies on professors who have phDs, but they don't know how to convey a message across to their students. They are smart, but cannot teach. I need to pass Physics to graduate and I am glad these videos are here to help me to do what my professor can't.
It always amaze me how some of these random videos are able to clearly explain topics in about 10 mins but a two hour lecture for the same topic will have me lost beyond belief.
@@tinyr101 agreed, although this particular video isn't random, KhanAcademy is one the best ones there is at explaining fundamental topics :D
Its not their fault the great professors are not involved in text making. The low level beginners are involved in this. Just like the doctors in a higher position won't work much instead the medical students are writing the medicines for the patients.
It should be a fundamental human right to have access to this video (and more particularly this teacher)
hell yeah!!!!!!!!!!!
Exacly, even delta step couldn't make me understand!
Its a time function
You have several fundamental rights to access this video: Freedom of association, freedom of speech and listening, freedom of choice, just off the top of my head. What you don't have a fundamental right to is the labour of others; So find a way to power your computer and connect to the internet, freedom begins from there.
This single video is without a doubt the standard to which all education should be set- the clarity of something that can be so confusing in text or lecture astounds me. Thank you Khan Academy for everything you give students
Physicists really need to come up with better terminology. Are they purposely trying to confuse us... ?
And that's not even mentioning the current orientation which is opposite to actual electron flow.
bruh topology is worse, sets can be both open and closed
Ibnziyad Tariq
As with everything else in electricity, I blame Benjamin Franklin.
This guys have killed by brain cells😭😭
I want justice!!
really, really thanks, this is the best explanation of eletric potential in the entire youtube.
I second that! I'm an engineering student and I consider myself lucky to have found this.
Even delta step disappointed me at this one!
yupp that's right
this explains
the. MOST. confusing thing I've ever learned in physics. thank you so much I had a brain explosion.
I, too, had a brain explosion. Still picking up the pieces. If I was a woman, I would find this man and marry him. Heck, I am a man and I want to find him and marry him.
@@ryno1222 HAHAHAH lol !
Still confuzzled, but less
This is a deadly most wanted technical clearance ever in physics. I was so confused with potential and potential energy and the work done related to them. Now it is clear. I appreciate it very much.
Our physics book says a lot of things to make physics look fun, but at the end of the day they took all the important stuff out. Thank you very much for the video
I agree. Most authors don't teach these basic things to the bones like they should be, instead they choose to skip these important fundamental steps and replace them with meaningless fancy images instead.
@@ElVerdaderoAbejorro exactly.....
1:21 "Stick a big ol' charge in here."
Why did I start laughing all the sudden?
that what I told my big ole lady, and she got hot
You have no idea, I've been struggling with this concept for so long and I finally get it I just needed it broken down like that! Amazing teacher thanks for the video.
That's the clearest explanation i've found on youtube! Thanks a lot
It's not magic , just it's clear , and that's what our * educational systems* lack
I have only one word for this video - AMAZING
This is all when using a reference point at infinity, if he explained both with a random reference point, this would be the best video ever created...
I have been waiting for the longest time for a video on this. THANK YOU!!!
I need this guy to be my physics teacher😭
This is the best explanation of potential,i have watched numerous amount of vidoes on it and every video left me confused in some or other way but this is the best ans simplest explanation ever.
You're actually a life saver.
This may seem obvious to many but watching this masterpiece was the first time I actually realized that electric potential does NOT follow the inverse square law!
Was struggling a ton with my exercises, but I realized I just didn't get the whole difference between potential and potential energy.
Thanks!
It was this simple... why did I attend a 1 hour lecture to gain 0 knowledge when I could have just watched this 11 minute video and actually learn the topic...
Sometimes I wonder why we pay for College/University...
You are awesome. Unfortunately saw this after my exam, but I feel way better now. Thank you
David is the best! Very effective at explaining these complicated concepts
This is the best explanation for e potential/potential energy that I have ever seen. I finally understand now
not sure if i should be sad or happy that youtube is better then most education system.....
Best explanation I ever had just amazing😘
so whats the difference in concept between E=V/R and E=F/q
Thankyou very much...Was really confused with the topic...I am able to visualise and grasp the logic behind these terms...😊 It was a wonderful and clear explanation!
Excellent video, I finally somewhat understood electric potential after months of trying to figure out what it was. Thank you very much, KhanAcademy
This video really makes me to know about what is electric potential . Thanks sir
After a long search, I decided to watch this video to see what the fuck Electric Potential was so I wont fail my midterms tomorrow. And I'm glad I did, not only does it explain WHAT this is, but it also explains where the formulas for this come from. Thanks a bunch!
Does it matter who does work on it :external force or electric field?I mean,what if there is a negative charge instead positive?
man this was like a God sent. our professor glossed over this so hard. It seemed like it was much simpler in class but I was not getting it. thankfully there are people like you out there who can relate and actually tell us why we care about this concept. Thank you
Very best explanation of electric potential in the entire youtube😘👌👌
Very difficult topic -- thanks for boiling it down!
Sooooooooo good!! Genius!
This video cleared all doubts about electric potential...... awesome video
Ok I had tears in my eyes 👀 for the love of physics and first time I understand this.
This video is EPIC😎. Whenever I get a doubt in this topic, I come here and never go back disappointed😊😊
Thank you! This visual makes way more sense than a paragraph of info in my textbook!
very informative,easy to understand and crisp video.Very good work here.Thanks a lot!
Electric Potential of a charge Q, V=k*Q/r
Units: [J/C]
- Can be positive or negative depending on charge.
- Electric Potential Energy = V*q = k*Q*q/r ; Units: [J]
(or electric potential energy of a body of charge q placed at point in electric field of charge Q at distance r, will be: KQq/r
)
(Def. Electric potential energy of a body at a point in an electric field of another body is defined as the amount of work done in bringing the given body from infinity to that point without acceleration.)
Gravitational Potential of a mass M, U=GM/r
Units: [J/Kg]
- Always negative.
- Gravitational Potential Energy = U*m = G*M*m/r
(or gravitational potential energy of a body of mass m placed at point in gravitational field of mass M at distance r, will be: GMm/r
)
(Def. Gravitational potential energy of a body at a point in a gravitational field of another body is defined as the amount of work done in bringing the given body from infinity to that point without acceleration.)
The world's best teacher thanks
Thanks a lot you save my life!
WOWWW. I HAVE NEVER SEEN SUCH AN AMAZING VIDEOOOOOOOOOOOO
Best explanation ever on this topic!
those dots are trippy >
the man who named this shit will get a name on my death note
Thanks David SantoPietro. Very Cool!
Thanks for this amazing video. Very helpful in explaining this topic! Bravo Khan.
THANK U
Thanks a lot sir l've been struggling with this topic that was very effective explanation
You teach magical
Thank you for the video, this helped me out tons!
A real hero
Speechless.
Just just thank you!
Thank you
you're just too good man!!!
Believe it or not, a moving magnet may also generate an electric potential, but such an electric potential depends not just on the position of the magnet but also the velocity of the magnet. Source: "Electromagnetic interactions derived from potentials: charge and magnetic dipole" by Roberto Coïsson
wow this is a great explanation !
Thanks 🎉
Good job done
this video helped me so much, you are a lifesaver!!! thank you!!!!!
Man, i love it. And thank you!
Thank you....
Really gives you a better idea....
Are you a communications major, because you are an excellent communicator of Electric potential?
thank you sir , it helped me a lot
What screen recording software do you use? I would like to know a good one that allows me to pause recording.
I came across electric potential defined as the amount of work needed to move a charge q to some distance r against(?) the direction of the electric field; hence, V = Er = (kQ/r2) r = kQ/r
damn he killed it, that's the best explanation ever
You are the best! Thanks a ton :)
You nailed it .
He cleared potential different topic in 10seconds
amazing explanation
This explanation is amazing!
thank you so much!!!
Thank you very much for this beautiful explanation and for all your effort.
So if you were to place a second charge right on top of Q, the r would be 0, and V would be infinity?
This topic used to be tough but not now
absolutely fantatstic video
This helped so much thank you!
thank u so much
10:38 the difference in electric potential results in voltage....It is confusing me...Coz the units also don't match...The remaining explanation was the best i could get
best explanation .. thnx ...
So nice thanks sir
Great video!
At 1:05 you say the V value at any point without any charge
around, would be zero. This makes sense.
Then at 1:20 you say to make any point have a V value that is non-zero, all you have to do is place a charge at any point.
Then at 2:15, you say if this point (bottom left corner) happened to have a V value of 100 joules/coulomb. This contradicts the comment at 1:05 where you say a point without a charge would have V = 0. But at 2:15, you are referring to a point that doesn’t have a charge (no coulombs) and instead of V = 0, this point has a hypothetical V value of 100 joules/coulomb. How could this point have a V value even though there isn’t any charge at this point?
1:30 points AROUND the charge have a non-zero V
superb video.....but at 8:50 why did he have to say that it isn't 'r' squared?Wasn't necessary:p
Thx a bunch dude helped alot
I dont see a problem with Electric potential energy. It is not abstract. It is indeed a potential energy per unit charge. By convention consider a small positive unit test charge and release it near a large distriibution of positive charge, that test charge has a potential energy that will be converted to kinetic energy as the repulsive force from the positive charge distribution drives it out. The kinetic energy it finally acquires is = its original potential energy and that potential energy divided by the test charge is called its PE per unit charge, or electric potential.
I wanna ask just to clarify, is coulomb a charge?
When he said " V " I felt that
Is the charge being negative or positive gonna affect the calculation?
You're the best. I love u
This guy is awesome B)
Helpful
Expound on the relationship of Electric Potential between two points in space and Electric Potential value at one point in space.
starting from V = U/q how do i derive the formula V = k_e * (q/r)
V=Fs cos theta /colulumb hence potential difference should be more with more displacement but u say potential should be more close to charge how...???
Bonjour est-ce que cette vidéo existe en Français , c'est la seul notion que j'ai du mal à comprendre (le potentiel Electrique ) et qui est en anglais, si on ne maîtrise pas l'anglais c'est difficile de bosser sur un sujet dont on a déjà un peu de mal , merci .