In a plane electromagnetic wave, the electric field oscillates sinnusoidally at a frequency of `2xx10^(10)Hz` and amplitude `48 V//m`. The amplitude of oscillating magnetic field will be

Options

A. `(1)/(16) xx 10^(-8)"Wb/m"^2`
B. `16 xx 10^(-4) "Wb/m"^2`
C. `12 xx 10^(-7) "Wb/m"^2`
D. `(1)/(12) xx 10^(-7) "Wb/m"^2`

Answer

B

Explanation

`B = (E)/( c ) = (48)/( 3 xx 10^5) = 16 xx 10^(-8) "Wb/m"^2`