Question

electromagnetic wave equation in a medium having finite permibility and permiability but zero conductance?​

Answer 1

Explanation:

I think the propagation constant of the wave in the wire is a complex number. The refractive index is large and complex, with nearly equal real and imaginary parts (both about 7000 at 10 GHz) so that alpha and beta in the propagation constant are large (lots of radians per metre and lots of nepers per metre). For frequencies above 1 MHz the attenuation in copper is above 20 dB/mm I think, so resonance across normal wires is not a consideration. Because of the high losses propagation along the inside of the wire does not carry significant power. Anything that gets into the wire is absorbed pretty much at the point where it gets in.