A point charge +Q is placed at the centre 0 of an uncharged hollow spherical conductor of inner radius 'a' and outer radius 'b'.Find the following.
The magnitude and sign of the charge induced on the inner and outer surface of the conducting shell.

Explanation

As the electrostatic field inside a conductor is zero, using Gauss’s law, charge on the inner surface of the shell = -Q
Charge on the outer surface of the shell = +Q