Question

2. A point charge Q is placed at point P at a distance
R from the centre of a metallic spherical shell of
inner radius 2R and outer radius 2.5 R. The electric
potential at the centre of the shell will be
​

Answer 1

Answer:

If it is a solid conducting sphere:

In the static condition, there is no electric field and no net charge at any point inside a conductor. The charge must appear at the surface of the conductor. Potential V at the centre or any point inside it is same and its value is that at its surface (a conductor is an equipotential volume). Hence

V=14πϵoqR