Charge on a charged conductor resides
- A. uniformly throughout its volume
- B. on its outer surface, concentrating most where the surface is sharply curved
- C. at its centre
- D. only where it was first placed
Explanation
Mutual repulsion drives the charges as far apart as possible, so they collect on the outside, and the surface charge density is highest at points and edges. This concentration produces the very strong field that ionises the surrounding air at a sharp point, which is the principle of the lightning conductor. Inside the metal the field remains zero.