Give main characteristics of intrinsic semiconductors.

Explanation

### Step-by-Step Text Solution

1. **Definition of Intrinsic Semiconductors**:
- Intrinsic semiconductors are pure semiconductors that do not contain any significant amount of impurities. They are made of a single type of material, typically silicon (Si) or germanium (Ge).

2. **Characteristic 1 - Purity**:
- The first characteristic of intrinsic semiconductors is that they are pure. This means that there are no dopants or impurities added to alter their electrical properties.

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