Question

A charge $Q$ is placed inside the sphere of radius $a$ then what will be the value of charge that will be accumulated on the surface of the sphere,

• A. $0$
• B. $Q$
• C. $-Q$
• D. $-2Q$

Answer 1

Answer: (B)

$Q$

We know that the charge inside a conductor is zero. When a charge $Q$ is placed inside the conductor, $-Q$ will induce on inner surface and $+Q$ will induce on outer surface such that total charge inside the conductor is zero.

Thus, the charge accumulated on the surface of sphere will be $Q$.