Why the electrostatic field is zero in the interior of a conductor?

Asked by Topperlearning User | 23rd Apr, 2015, 10:31: AM

Expert Answer:

When a conductor is placed in an electric field, its electrons begin to move in the opposite direction to that of external electric field

(begin mathsize 11px style straight E with rightwards arrow on top subscript external end style ). Due to this external field, negative and positive charges are induced on two ends of the surface of the conductor. The process continues till the electric field (begin mathsize 11px style straight E with rightwards arrow on top subscript induced end style ) set up by the charges becomes equal and opposite to the external field. Hence, the net field begin mathsize 11px style straight E with rightwards arrow on top space equals space open parentheses straight E with rightwards arrow on top subscript external space minus straight E with space rightwards arrow on top subscript induced space close parentheses end style inside the conductor will be zero.

Answered by  | 23rd Apr, 2015, 12:31: PM