
The inductance for long straightwires and rectangular bars will be calculated.
The permeability of the medium is assumed to be 1. For other media, simply multiply by the relative permeability.In all cases, the current is assumed to flow in the outer surface of the conductors. The approximate formulas used to calculate the inductance can be found in Radio Engineering Handbook by Terman. Most of them are derived in the book "Inductance Calculations" by F. W. Grover.

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