question_answer

A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x-direction. At a particular point in space and time,\[\overrightarrow{E}=6.3\text{ }\overrightarrow{j}\text{ }V/m\]. The corresponding magnetic field B, at that point will be- [JEE Main 09-Jan-2019 Morning]

A)       \[18.9\times {{10}^{-8}}\text{ }\widehat{k}T\]

B) \[2.1\times {{10}^{-8}}\text{ }\widehat{k}T\]

C) \[18.9\times {{10}^{8}}\text{ }\widehat{k}T\]

D) \[6.3\times {{10}^{-8}}\text{ }\widehat{k}T\]

Correct Answer: B

Solution :

[b]

Direction of wave is in direction of

So, option [b] is correct