The electrical conductivity of semiconductor is

Options

A. `10^(8)ohm^(-1)cm^(1)`
B. `10^(-22)ohm^(-1)cm^(1)`
C. In the range of `10^(-9)` to `10^(2) ohm^(-1)cm^(-1)`
D. None of the above

Explanation

To solve the question regarding the electrical conductivity of semiconductors, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Electrical Conductivity**:
- Electrical conductivity (σ) is defined as the ability of a material to conduct electric current. It is the reciprocal of resistivity (ρ).
- Mathematically, this can be expressed as:
\[ \sigma = \frac{1}{\rho} \]

2. **Understanding Resistivity**:
- Resistivity (ρ) can be derived from Ohm's Law, which states:
\[ R = \frac{\rho L}{A} \]
- Here, R is the resistance, L is the length of the conductor, and A is the cross-sectional area.
- Rearranging this equation gives:
\[ \rho = \frac{R A}{L} \]

3. **Units of Resistivity and Conductivity**:
- The unit of resistance (R) is ohms (Ω).
- The unit of area (A) is in square meters (m²) or square centimeters (cm²).
- Therefore, the unit of resistivity (ρ) is ohm-centimeter (Ω·cm) when using centimeters.
- Consequently, the unit of conductivity (σ) becomes:
\[ \sigma = \frac{1}{\rho} \Rightarrow \text{Unit of conductivity} = \text{ohm}^{-1} \cdot \text{cm}^{-1} \]

4. **Conductivity Ranges**:
- It is important to know the typical ranges of electrical conductivity for different materials:
- **Insulators**: σ ≤ 10⁻⁶ S/cm
- **Semiconductors**: σ is in the range of 10⁻⁹ to 10² S/cm
- **Conductors**: σ ≥ 10² S/cm

5. **Identifying the Correct Option**:
- Given the ranges above, we can see that the electrical conductivity of semiconductors falls between 10⁻⁹ S/cm and 10² S/cm.
- Therefore, if the options provided include a range that fits this description, we can select that option as the correct answer.

### Conclusion:
Based on the analysis, the electrical conductivity of semiconductors is in the range of \(10^{-9}\) to \(10^{2}\) S/cm. If option 3 states this range, it is the correct choice.