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The magnetic field in a plane electromag...

The magnetic field in a plane electromagnetic wave is given by
`B_(y) = 2 xx 10^(-7) sin (0.5 xx 10^(3)x + 1.5 xx 10^(11) t)`.
This electromagnetic wave is

A

`vecE = -60 sin (0.5 xx 10^3 + 1.5 xx 10^(10)t) hatj Vm^(-1)`

B

`vecE = +60 sin (0.5 xx 10^3 + 1.5 xx 10^(10)t) hatj Vm^(-1)`

C

`vecE = +60 sin (0.5 xx 10^11 + 1.5 xx 10^(3)t) hatj Vm^(-1)`

D

`vecE = -60 sin (0.5 xx 10^3 + 1.5 xx 10^(11)t) hatj Vm^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`E = B_0c`
`= 2 xx 10^(-7) xx 3 xx 10^(8)`
`= 10 v//m`
`:. vecE = -60 sin (0.5 xx 10^(3)x + 1.5 xx 10^11)hatj v//m` .
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