i never really understood motional emf truly before this. Well I'm pretty sure there must be more to learn about motional emf, but for now this would suffice. thanks a lot khan academy!
Nice explanation. I have one doubt though. You're saying the magnetic field doesn't do any work because of the derivation for total work, but when you're deriving the vertical displacement you're taking u*dt, and assuming that u is constant. I get that for a small time change dt this can be assumed to be true, but still in reality isn't the vertical force still doing a very small amount of work in the downward direction, because I don't see a force opposing it and so the resultant force on the electron would be downward. This confuses me and really seems to break down the entire explanation from that point, so can someone help me understand what's going on or if I am missing something.
At 1:04 there is a mistake. As found out in the previous video - in the top part of the rod there will be a positive charge accumulated and in the bottom part, there will be a negative charge. So by convention, the current should be going down!! How is it going up?? Or what mistake am I making??
Dear #KhanAcademy.....
It Is Request You To Please Make Physics Video From Our Beloved *Mahesh Shenoy* Sir.....
We Love The Way He Teaches Us .....
Bro.. Don't underrated this video... What a wonderful video bro..
Khan acadamy is a blessing
i never really understood motional emf truly before this. Well I'm pretty sure there must be more to learn about motional emf, but for now this would suffice. thanks a lot khan academy!
OMG You Explained it in such a beautiful wayyyy🤩🤩I like this new teacher Vibhor sir thankyouu so much👍👍👍 such an underrated video 😧
Yes what a explanation 🔥
Nice explanation. I have one doubt though. You're saying the magnetic field doesn't do any work because of the derivation for total work, but when you're deriving the vertical displacement you're taking u*dt, and assuming that u is constant. I get that for a small time change dt this can be assumed to be true, but still in reality isn't the vertical force still doing a very small amount of work in the downward direction, because I don't see a force opposing it and so the resultant force on the electron would be downward.
This confuses me and really seems to break down the entire explanation from that point, so can someone help me understand what's going on or if I am missing something.
At 1:04 there is a mistake. As found out in the previous video - in the top part of the rod there will be a positive charge accumulated and in the bottom part, there will be a negative charge. So by convention, the current should be going down!!
How is it going up?? Or what mistake am I making??
@GreAse0MonKey
The direction of current is in opposite direction of electron (conventional current)
its wrong, the lightbulb should be outside the field