A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 5 V. What is the potential at the centre of the sphere?

Explanation

To solve the problem, we need to find the potential at the center of a hollow metal sphere given that the potential on its surface is 5 V.

### Step-by-Step Solution:

1. **Understanding the Properties of a Hollow Metal Sphere:**
- A hollow metal sphere has the property that the electric field inside it is zero. This is due to the fact that charges reside on the surface of the conductor and do not affect the interior.

2. **Potential Inside the Sphere:**
...