Question

The electric field of EM wave is $6volt/m$. The magnetic field associated with the wave if the wave is propagating in $+x$ direction and electric field along y-axis is ?

• A. ${10}^{-8}T\hat{k}$
• B. $2\times {10}^{-8}T\hat{k}$
• C. $3\times {10}^{-8}T\hat{k}$
• D. $4\times {10}^{-8}T\hat{k}$

Answer 1

The correct option is B $2\times {10}^{-8}T\hat{k}$

$E=BC$
$B=\frac{E}{C}=\frac{6}{3\times {10}^8}$$=2\times {10}^{-8}T\hat{k}$