Question

A solid copper sphere has a charge of +Q on it. Where on the sphere does the charge reside?

• A. +Q at the center of the sphere
• B. Q /2 at the center of the sphere and Q /2 on the outer surface
• C. Q at the center of the sphere and +2Q on the outer surface
• D. +Q on the outer surface
• E. The charge is spread evenly throughout the sphere

Answer 1

The correct option is D +Q on the outer surface

The charge given to a conductor always spreads on the surface of a conductor , in order to achieve equilibrium position due to repulsion force among them , because if they reside inside the conductor they repel each other so they come out on the surface of conductor , that is the maximum possible distance at which repulsion is minimum .