Question

A radio wave has a maximum magnetic field induction of ${10}^{-4}$T on arrival at a receiving antenna. The maximum electric field intensity of such a wave is

• A. zero
• B. $3\times {10}^{4}V{m}^{-1}$
• C. $5.8\times {10}^4$T
• D. $3.0\times {10}^5$T

Answer 1

The correct option is B $3\times {10}^{4}V{m}^{-1}$

$E_0=c{B}_0=3\times {10}^8\times {10}^{-4}=3\times {10}^{4}V{m}^{-1}$