If I have ring conductor, with static electric charge Q, the E=field around the ring is not zero, but the H magnetic field is zero, because charge are not moving. Now if I put the ring in rotation around it center, example putting the ring on disk of phonograph, the charge are moving, but there are not flux current inside the wire ? then there is not B magnetic field ?
At 24:40, shouldn't the source point be at (rho,phi,0)? Why do you exclude phi? I suppose the field P(0,0,h) is in cylindrical coordinates? At P, radius is 0, so phi is zero and we only have h as the cylinder height. Why is this not the same in the field point?
Thank you for the video ,and your efforts
As physics student this helps me a lot. Keep going ! :)
If I have ring conductor, with static electric charge Q, the E=field around the ring is not zero, but the H magnetic field is zero, because charge are not moving.
Now if I put the ring in rotation around it center, example putting the ring on disk of phonograph, the charge are moving, but there are not flux current inside the wire ? then there is not B magnetic field ?
At 24:40, shouldn't the source point be at (rho,phi,0)? Why do you exclude phi? I suppose the field P(0,0,h) is in cylindrical coordinates? At P, radius is 0, so phi is zero and we only have h as the cylinder height. Why is this not the same in the field point?