Question

the skin depth of 1mhz radio wave at room temperature pressure is 0.0001m.calculate the skin depth of 1mega hertz at 15kelvin when the conductivity is increased by a factor 10000

Answer 1

The skin depth of a good conductor is given by
   
where, f is the frequency of the wave and \sigma is the conductivity of the material. And so, as the conductivity changes keeping everything else unchanged, then, the ratio of skin depths at two different conductivity is given by