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A plane e.m. wave travels in free space ...

A plane e.m. wave travels in free space along X-axis. At a particular point in space, the electric field along Y-axis is `9.3 V m^-1`. Magnitude of magnetic induction along Z-axis is

A

`3.1 xx 10^-7 T`

B

`3.1 xx 10^-8 T`

C

`3 xx 10^-5 T`

D

`9.3 xx 10^-6 T`.

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