Give main characteristics of holes present in semiconductor.

Explanation

To answer the question regarding the main characteristics of holes present in semiconductors, we can outline the following points:

### Step-by-Step Solution:

1. **Unit Positive Charge**:
- Holes are considered to carry a positive charge equivalent to that of an electron, but with a positive sign. This means that when an electron leaves its position in the semiconductor lattice, it creates a hole that behaves as if it has a positive charge.

2. **Mass of the Hole**:
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