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The amplitude of electric field in an electromagnetic wave is 60 Vm^(-1) . Then the amplitude of magnetic field is

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Answer Text

`2 xx 10^(-7) T``2 xx 10^(7) T``6 xx 10^(7) T``6 xx 10^(-7) T`

Answer :
A
Solution :
Given , <br> `E_(0) = 60 V//m` <br> `E_(0) = ?` <br> The speed of e.m.wave <br> `c = (E_(0))/(B_(0))` <br> `E_(0) = (E_(0))/(c) " "[:.c = 3 xx 10^(8) m//s] ` <br> `= (60)/(3 xx 10^(8)) = 20 xx 10^(-8)` <br> `= 2 xx 10^(-7) T`

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