Recent content by 1q2w3e

it's all good I've worked it out thanks to all for help

so you are saying substitude rho for j(current density) in the equation, and that the drift velocity Vd= omega(x)*rho... is it omega or omega(vector)? then that means the entire equation becomes rho=rho*omega(s)*rho and the omega(x)=1 I don't get how that works, can you please explain...

I understand the last part about the rod haveing no intrinsic motion, but I don't get what you mean by "Find the current density at position r from the central axis" to do this, i'd need to use the current density formula again which lead me back to the problem of what I should use for the drift...

well in the formula you need to use the drift velocity yeah? but then in the original quesiton, you are also given the angular velocity, I am just not too sure if I need to somehow combine this angular velocity into the drift velocity and if so how?

Hi this is the first time I've posted something don't know how long it usually take for replies but any help would be muchly apprecitated. This question asks: A long solid cylinder, radius R, carries uniform charge density p. the cylinder is rotating around the cetral axis with constant...