Why a third hole in a socket provided for grounding?

Explanation

### Step-by-Step Solution:

1. **Understanding the Purpose of Grounding**:
- The third hole in a socket is provided for grounding, which is a safety feature in electrical appliances. Grounding helps to prevent electric shocks.

2. **Identifying Faulty Connections**:
- Electrical appliances can sometimes have faulty connections. These faults can lead to the accumulation of electric charge on the appliance's surface.

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