# Wire Capacitor

Electricity and Magnetism Level 5

Determine the Capacitance per unit length of a system consisting of two long parallel, cylindrical conducting wires of radius $$\displaystyle R$$ each. The separation between the axes of the wires is $$\displaystyle d$$.

Details and Assumptions:
$$\bullet$$ $$\displaystyle d = 1 mm$$
$$\bullet$$ $$\displaystyle R = 0.4 mm$$
$$\bullet$$ Note that approximating the cylindrical wires as line charges won't work.

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