The problem posed last week confused me quite a lot. Frankly speaking, I could not understand physics of that problem and when finally I saw the solution, I am confused even more. This is because most of the solutions given simply balance magnetic force value to centripetal force value. But I don't think that physics of the problem is clear from this. In particular, I have following questions:
(1)Will "all" the free electrons inside the cylinder move to surface ultimately? If not, what is stopping them?
(2)As many given solutions say, there has to be electric field inside to provide necessary centripetal force. But then how is that field generated? I mean, how a motion of a particular electron causes some field to be created?
(3)Why the motion of charged particle in electric and magnetic fields will be such that internal fields are exactly canceled?
I hope that people would respond. Thank you :)