The capacitance per unit length \( C/L \) of a cylindrical capacitor is given by the formula:
\[ \frac{C}{L} = \frac{2\pi\epsilon_0}{\ln\left(\frac{b}{a}\right)} \]
where:
- \( \epsilon_0 \) is the permittivity of free space,
- \( a \) is the inner radius of the
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