What is a semiconductor? Describe the two main types of semiconductor and contrast their conduction mechanism.

Explanation

**Step-by-Step Solution:**

1. **Definition of Semiconductor:**
- A semiconductor is a material whose electrical conductivity is between that of a conductor and an insulator. Its conductivity increases with temperature, which is a key characteristic.

2. **Types of Semiconductors:**
- There are two main types of semiconductors:
- **Intrinsic Semiconductors**
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