Internal impedance of conductors of rectangular cross section

It is shown that the resistance and internal inductive reactance of a condu ctor of rectangular cross section are not equal when skin effect is well de veloped, i.e., when the cross-sectional dimensions are much larger than a s kin depth, unlike the case of a conductor of circular cylindrical cross sec tion. Hence, the high-frequency internal inductance cannot be determined fr om the resistance and must be computed separately. Also, the widely used ti me-domain representation of the internal impedance B root s: is not valid. Numerical results are given for conductors of various cross-sectional aspec t ratios and dimensions.