A conducting sphere of radius R has a charge. Then,

Options

A. The charge is uniformly distributed over its surface, if there is an external electric field.
B. Distribution of charge over its surface will be non uniform if no external electric field exist in space
C. Electric field strength inside the sphere will be equal to zero only when no external electric field exists
D. Potential at every point of the sphere must be same in all cases

Answer

D

Explanation

Charge distribution will be non-uniform in presence of an external field.
Field inside the conducting sphere will be zero in all cases & potential at every point will be same.