question_answer

If the magnetic field of a plane electromagnetic wave is given by (the speed of light \[=~\,3~\times ~{{10}^{8}}m/s)\] \[B\,=\,100\times {{10}^{-6}}\,\sin \,\left[ 2\pi \times 2\times {{10}^{15}}\left( t-\frac{x}{c} \right) \right]\]then the maximum electric field associated with it is – [JEE Main 10-Jan-2019 Morning]

A) \[4.5\times {{10}^{4}}\,N/C\]

B) \[4\times {{10}^{4}}\,N/C\]

C) \[6\times {{10}^{4}}\,N/C\]

D) \[3\times {{10}^{4}}\,N/C\]

Correct Answer: D

Solution :

[d] Maximum magnetic field

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