Q 12-08-175JEE MainJEE Main 2021 (27 Aug, Shift 2)Easy
A plane electromagnetic wave with a frequency of $30$ MHz travels in free space. At a particular point in space and time, the electric field is $6$ V m$^{-1}$. The magnetic field at this point will be $x\times10^{-8}$ T. The value of $x$ is,
Numerical value type. Enter your answer.
Answer: 2
$B = \dfrac{E}{c} = \dfrac{6}{3\times10^8} = 2\times10^{-8}$ T, so $x = 2$.
Solution by Sreeraj P, M.Sc Physics