What is order of conductivity of conductor?

Answer

To determine the order of conductivity of a conductor, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Conductivity and Resistivity**:
- Conductivity (σ) is defined as the ability of a material to conduct electric current. It is the reciprocal of resistivity (ρ), which measures how strongly a material opposes the flow of electric current.
- The relationship can be expressed as:
\[ \sigma = \frac{1}{\rho} \]

2. **SI Units**:
- The SI unit of conductivity is ohm inverse meter inverse (Ω⁻¹·m⁻¹), which indicates how much current can flow through a material per unit voltage and per unit length.

3. **Characteristics of Conductors**:
- Conductors, such as metals, have a high density of free electrons that facilitate the flow of electric current. This results in high conductivity values.

4. **Order of Conductivity**:
- The order of conductivity for typical conductors is generally in the range of \(10^7\) to \(10^8\) ohm inverse meter inverse (Ω⁻¹·m⁻¹).
- For example, copper, a common conductor, has a conductivity of approximately \(5.8 \times 10^7\) Ω⁻¹·m⁻¹.

5. **Final Answer**:
- Therefore, the order of conductivity of a conductor can be stated as:
\[ \sigma \approx 10^8 \, \text{Ω}^{-1} \cdot \text{m}^{-1} \]

### Summary:
The order of conductivity of a conductor is approximately \(10^8 \, \text{Ω}^{-1} \cdot \text{m}^{-1}\).