Electric Potential: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Electric Potential. Understanding the underlying formula is key to arriving at the correct answer below:

In electrostatic equilibrium, the electric field inside a conductor is zero ($E = 0$). Since $E = -\frac{dV}{dr}$, the potential $V$ must be constant everywhere inside and on the surface of the conductor.