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A plane electromagnetic wave of frequenc...

A plane electromagnetic wave of frequency 50 MHz travels in free space along the x-direction. At a particular point in space and time, `vecE=6.3hatj"V m"^(-1)`.
At this point `vecB` is equal to

A

`4.2 xx10^(-8) hatk T`

B

`2.1 xx10^(-8) hatk T`

C

`18.9 xx10^(-8) hatk T`

D

`2.1 xx10^(-8) hatk T`

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