Draw the energy band diagram of a n-type semiconductor. Deduce an expression for conductivity of a n-type semiconductor.

Explanation

To solve the question, we will follow these steps:

### Step 1: Draw the Energy Band Diagram of an n-Type Semiconductor

1. **Identify the Energy Bands**: In a semiconductor, there are two main energy bands: the conduction band (CB) and the valence band (VB).
2. **Position of Fermi Level**: In an n-type semiconductor, the Fermi level (E_F) is located closer to the conduction band than to the valence band due to the presence of extra electrons contributed by donor impurities.
3. **Label the Diagram**:
- Draw the conduction band at a higher energy level.
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