A coaxial cable used in transmission line has an inner radius of 0.10 mm and an outer radius of 0.40mm. Calculate the capacitance per meter for the cable. Assume that the space between the conductors is filled with epoxy resin with dielectric constant 3.6.

Explanation

To calculate the capacitance per meter for a coaxial cable with the given parameters, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Values**:
- Inner radius (Ra) = 0.10 mm = 0.10 × 10^-3 m = 0.1 × 10^-3 m
- Outer radius (Rb) = 0.40 mm = 0.40 × 10^-3 m = 0.4 × 10^-3 m
- Dielectric constant (εr) = 3.6
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