Give band gap Eg value for conductor, Insulator and semiconductor

Answer

To answer the question regarding the band gap (Eg) values for conductors, insulators, and semiconductors, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Energy Bands**:
- In solids, energy levels are grouped into bands. The two most important bands are the **valence band** (filled with electrons) and the **conduction band** (where electrons can move freely and conduct electricity).

2. **Band Gap in Conductors**:
- In conductors, the conduction band and the valence band overlap. This means there is no energy gap between them.
- **Band Gap (Eg) for Conductors**: **0 eV** (no band gap).

3. **Band Gap in Semiconductors**:
- In semiconductors, there is a small energy gap between the valence band and the conduction band. This gap allows some electrons to jump from the valence band to the conduction band when energy is supplied (like heat or light).
- **Band Gap (Eg) for Semiconductors**: Approximately **1 eV**.

4. **Band Gap in Insulators**:
- In insulators, the energy gap between the valence band and the conduction band is large. This large gap prevents electrons from jumping to the conduction band under normal conditions, making them poor conductors of electricity.
- **Band Gap (Eg) for Insulators**: Approximately **6 eV**.

### Summary of Band Gap Values:
- **Conductors**: Eg = **0 eV**
- **Semiconductors**: Eg ≈ **1 eV**
- **Insulators**: Eg ≈ **6 eV**