For a charged cylindrical conductor of cross - sectional radius R, what is the relation between the surface charge density and linear charge density?

Explanation

To find the relation between the surface charge density (σ) and the linear charge density (λ) for a charged cylindrical conductor of cross-sectional radius R, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Surface Charge Density (σ)** is defined as the charge per unit area on the surface of the conductor. It is given by the formula:
\[
\sigma = \frac{Q}{A}
...