In an electromagnetic wave in free space the root mean square value of the electric field is E r m s = 6 V m…

In an electromagnetic wave in free space the root mean square value of the electric field is Erms=6 V m-1. The peak value of the magnetic field is
  1. 1.41×10-8 T
  2. 2.83×10-8 T
  3. 0.70×10-8 T
  4. 4.23×10-8 T

Solution

Speed of electromagnetic wave c is given by, ErmsBrms=c
Brms=Ermsc
=63×108
Brms=2×10-8
Brms=B02
B0= 2×Brms
= 2×2×10-8
=2.83×10-8 T

Asked in: NEET 2017

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