A plane electromagnetic wave of frequency `20 MHz` travels through a space along x-direction. If the electric field vector at a certain point in space is `6 Vm^(-1)`,then what is the magnetic field vector at that point?

Options

A. `2 xx 10^(-8) T`
B. `1/2 xx 10^(-8) T`
C. `2T`
D. `1/2 T`

Answer

A

Explanation

The magnetic field, `B = (E)/(c)`, where, `c = 3 xx 10^(8)ms^(-1)`
`rArr B = (6)/(3 xx 10^(8)) = 2 xx 10^(-8) T`