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The magnetic field In a travelling elect...

The magnetic field In a travelling electromagnetic wave has a peak value of `20 n T ` The peak value of electric field strength is :

A

3V/m

B

6V/m

C

9V/m

D

12V/m

Text Solution

Verified by Experts

The correct Answer is:
B
From question,
`B_(0)=20nT=20xx10^(-9)T`
`(because " velocity of light in vacuum C"=3xx10^(8)ms^(-1))`
`vec(E_(0))=vec(B_(0))xx vecC|vec(E_(0))|=|vecB|.|vecC|=20xx10^(-9)xx3xx10^(9)xx3xx10^(8)=6V//m.`
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DISHA PUBLICATION-ELECTROMAGNETIC WAVES-Exercise - 1 : Concept Builder (Topicwise)(Topic 1 : Electromagnetic Waves and Displacement Current)
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