Prove that a closed equipotenitial surface with no charge within itself must enclose an equipotential volume.

Explanation

To prove that a closed equipotential surface with no charge within itself must enclose an equipotential volume, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Equipotential Surfaces**:
An equipotential surface is defined as a surface where the electric potential is constant. This means that no work is required to move a charge along this surface.

2. **Assumption of No Charge Inside**:
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