Wire Capacitor

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

Details and Assumptions:

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

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