Answer
The amplitude of the electric field is $0.012~V/m$
The frequency of the electric field is $120~GHz$
Work Step by Step
We can find the amplitude of the electric field:
$E = c~B$
$E = (3.0\times 10^8~m/s)~(4.00\times 10^{-11}~T)$
$E = 0.012~V/m$
The amplitude of the electric field is $0.012~V/m$
Since the frequency of the electric field is the same as the frequency of the magnetic field, the frequency of the electric field is $120~GHz$
