Q. A plane electromagnetic wave travels in free space along $x$-axis. At a particular point in space, the electric field along $y$-axis is $9.3\ Vm^{- 1}$. The magnetic induction $(B)$ along $z$-axis is
A) $3.1 \times 10^{- 8}T$
B) $3 \times 10^{- 5}T$
C) $3 \times 10^{- 6}T$
D) $9.3 \times 10^{- 6}T$
Explanation
(a) Velocity of light
$C = \frac{E}{B} \Rightarrow B = \frac{E}{C} = \frac{9.3}{3 \times 10^{8}} = 3.1 \times 10^{- 8}T$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.