Question

A medium has conductivity σ = 10^2 mho/m, μ = 2, ε = 3 . The depth of penetration at 2 MHz is?

Answer 1

The depth of penetration is given by the formula (see https://en.wikipedia.org/wiki/Skin_effect):

$$\delta =\dfrac{2}{\sigma} \sqrt{\dfrac{\epsilon}{\mu}}$$

Substituting the values, obtain:

$$\delta =\dfrac{2}{10^2\cdot 10^{-3}} \sqrt{\dfrac{3}{2}} = 24.5m$$

Answer. 24.5m