1.

A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the electric field vector at a certain point in space is 6V m^(-1), what is the magnetic field vector at that point ?

Answer»

`2 xx 10^(-3) T`
`(1)/(2) xx 10^(-8) T`
2T
`(1)/(2) T`

SOLUTION :The MAGNETIC field `B=(E)/(c)` where `c=3 xx 10^(8) m // s`
`B=(6)/(3 xx 10^(8))=2 xx 10^(-8) T`


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