Four identical point charges are placed at the corners of a square, A fifth point charge placed at the center of the square experiences zero net force . Is this a stable equilirium for the fifth charge? Explain.

Explanation

To determine whether the fifth charge placed at the center of the square formed by four identical point charges experiences stable equilibrium, we can analyze the forces acting on it and the potential energy associated with its position.

### Step-by-Step Solution:

1. **Understanding the Setup**:
- We have four identical point charges placed at the corners of a square.
- A fifth charge is placed at the center of the square.

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