The electric field intensity just outside a long charged metal cylinder in air is `100 V//m`. What is the surface density of the cylinder?

Explanation

To solve the problem, we need to find the surface charge density (σ) of a long charged metal cylinder given the electric field intensity (E) just outside the cylinder.

### Step-by-Step Solution:

1. **Identify the Given Information:**
- Electric field intensity (E) = 100 V/m
- We need to find the surface charge density (σ).

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