Determine the frequency range for which the conduction current exceeds the

displacement current by a factor of at least $100$ in sea water $($ $=4$ S$/$m$,=1)$

a$)$ take $=81$ for all frequencies.

b$)$ take a a frequency$-$dependent value from the lecture notes

c$)$ compare the results

d$)$ Determine the skin depth for silver for the following frequencies: $1$Hz$,1$MHz$,$ and $10$

GHz$.$