This is a doubt that's been irritating me for some time. I've got different answers from teachers and students whenever I've asked.
I have two hollow charged conducting spheres, A and B. The radius of A is greater than the radius of B and it also has a greater charge than B, let's say +2q (B has +q). If I put B inside A, and connect them with a wire, will charge flow from A to B or from B to A?
If charge flows from A to B, until both reach the same potential (which seems right to me), that goes against the thing that says a conductor should have all of its charge on the outer surface.
If charge flows from B to A (because all the charge on a conductor should be on the outer surface), then that means its flowing from lower to higher potential, which seems counter-intuitive.
Which one is correct? I've got a board exam tomorrow (think A levels) so it would be great if someone helped me out soon.
