Problem $9$:

A $50$ cm long dipole is excited by a sinusoidally varying current with an amplitude $\backslash ($ I$\_\{0\}=5\backslash$mathrm$\{$~A$\}\backslash ).$ Determine the time average power radiated by the dipole if the oscillating frequency is:

$($a$)1$ MHz $,$

$($b$)300$ MHz $.$