Wire Capacitor

Determine the capacitance per unit length (in F/m\si[per-mode=symbol]{\farad\per\meter}) of a system consisting of two long parallel, cylindrical conducting wires of radius RR each. The separation between the axes of the wires is dd.

Details and Assumptions:

  • d=1 mm\displaystyle d = \SI{1}{\milli\meter}
  • R=0.4 mm\displaystyle R = \SI{0.4}{\milli\meter}
  • Note that approximating the cylindrical wires as line charges won't work.
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