Question

A large hollow metallic sphere A is charged positively to a potential of 100 V and a small sphere B to a potential of 50 V. Now B is placed inside A and they are connected by a wire. In which direction will the charge flow

Answer 1

Answer:From B to A

Explanation:As the charge resides always on the outer surface therefore when both the spheres are connected by a wire,charge will flow essentially from inner to the outer surface whatever be the magnitude and sign of charge .

As soon as the sphere B is placed inside the sphere A ,if the potential of A becomes V then the potential of B becomes 50+V.

Since the potential of B is now higher than A,on connecting them through wire charge will flow from B to A.and this flow will continue untill the whole charge of B flows to A.