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In an electromagnetic wave in free space...

In an electromagnetic wave in free space the root mean square value of the electric field is `E_(rms ) = 6 `V/m. The peak value of the magnetic field is:

A

`2. 83 xx 10^(-6)` T

B

`0.70 xx 10^(-6)` T

C

`4.23 xx 10^(-6)` T

D

`1.41 xx 10^(-8)` T

Text Solution

Verified by Experts

The correct Answer is:
A
`E_("mn") = (E_0)/( sqrt2)`
`E_0 = sqrt2 E_("mn") `
`E_0 = sqrt(2) xx 6 "V/m"`
`(E_0)/(B_0) = C` br> `B_0 = (E_0)/( C ) ( 6 sqrt2 "V/m")/( 3 xx 10^8 "m/s")`
`B_0 = 2.824 xx 10^(-5)` T
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