Question

A solid conducting sphere having a charge $Q$ is surrounded by an uncharged concentric conducting spherical shell. Let the potential difference between the surface of the solid sphere and that of the outer surface of the shell be $V$. If the shell is now given a charge of $-3Q$. Find out the new potential difference between the two surface is:

• A. $V$
• B. $2V$
• C. $4V$
• D. $-2V$

Answer 1

The correct option is A $V$

Charge $=Q$

Shell be $=V$

due to equipotential surface new potential difference the two surface is same.

Hence potential $=V$