question_answer

A plane electromagnetic wave travels in free space along the x-direction. The electric field component of the wave at a particular point of space and time is \[E=6\,\,V{{m}^{-\,1}}\]along y-direction. Its corresponding field component, B would be:

A) \[2\times {{10}^{-\,8}}T\]along y-direction

B) \[6\times {{10}^{-\,8}}T\]along z-direction

C) \[2\times {{10}^{-\,8}}T\] along z-direction

D) \[6\times {{10}^{-\,8}}T\]along x-direction

Correct Answer: C

Solution :

\[B=\frac{E}{C}=\frac{6}{3\times {{10}^{8}}}=2\times {{10}^{-8}}(+z).\]