Q. In an electromagnetic wave in free space the root mean square value of the electric field is $E_{rms}$ = 6V/m. The peak value of the magnetic field is :
A) $1.41 \times 10^{-8}$ T
B) $2.83 \times 10^{-8}$ T
C) $0.70 \times 10^{-8}$ T
D) $4.23 \times 10^{-8}$ T
Explanation
[Solution] $B_0 = \sqrt{2}E_{rms}/c = 1.414 \times 6/(3 \times 10^8) = 2.83 \times 10^{-8}$ T. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.