Question

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is

• A. 6 V/m
• B. 9 V/m
• C. 12 V/m
• D. 3 V/m

Answer 1

The correct option is A

6 V/m

We know that, $E_0=c{B}_0$

$=3\times {10}^8\times 20\times {10}^{-9}=6V/m$