Q. In an electromagnetic wave, the electric and magnetizing fields are $100\ Vm^{- 1}$ and $0.265\ Am^{- 1}$. The maximum energy flow is
A) $26.5\ W/m^{2}$
B) $36.5\ W/m^{2}$
C) $46.7\ W/m^{2}$
D) None of these
Explanation
(a) Here $E_{0} = 100\ V/m,\ B_{0} = 0.265\ A/m$
$\therefore$ Maximum rate of energy flow $S = \frac{E_{0} \times B_{0}}{\mu_{0}}$
$= 100 \times 0.265 = 26.5\ W/m^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.