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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

`1.41xx10^-8T`

B

`2.83xx10^-8T`

C

`0.70xx10^-8T`

D

`4.23xx10^-8T`

Text Solution

Verified by Experts

The correct Answer is:
b
Here, `E_(rms)=6V//m, or (E_0)/(sqrt2)=6 or E_0=6sqrt2 V//m`
As `E_0=cB_0`
or `B_0=(E_0)/c=(6sqrt2)/(3xx10^8)=2sqrt2xx10^-8T`
`=2.83xx10^-8T`
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