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Magnetic field in a em wave is given by:...

Magnetic field in a em wave is given by: `B = 5 xx 10^-2 sin 1000 pi(4 x 10^8t -5x)tesla. Find amplitude of electric field in (V/m)

A

`4 xx 10^6`

B

`2 xx 10^6`

C

`1.5 xx 10^6`

D

`3 xx 10^6`

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