EM Waves — JEE Main PYQs

A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive $x$-direction. At a particular point in space and time, $\overrightarrow{\mathrm{E}}=6.3\hat{\mathrm{j}}\mathrm{V}/\mathrm{m}$. The corresponding magnetic field …

Given below in the left column are different modes of communication using the kinds of waves given in the right column.

From the options given below, find the most appropriate match between entries in the left and the right column.

The electric field of a plane electromagnetic wave is given by

The corresponding magnetic field $\vec{B}$ is then given by:

An EM wave from air enters a medium. The electric fields are
${\overrightarrow{\mathrm{E}}}_1={\mathrm{E}}_{01}\hat{x}\cos \left[2\pi \nu \left(\frac{z}{c}-\mathrm{t}\right)\right]$ in air and …

A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is:

Match List-I (Electromagnetic wave type) with List-II (Its association / application) and select the correct option from the choices given below the lists:

During the propagation of electromagnetic waves in a medium:

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT . The peak value of electric field strength is :

An electromagnetic wave in vacuum has the electric and magnetic fields $\vec{E}$ and $\vec{B}$, which are always perpendicular to each other. The direction of polarization is given by $\overrightarrow{\mathrm{X}}$ and that of wave propagation by …

This question has Statement -1 and Statement -2 . Of the four choices given after the statements, choose the one that best describes the two statements.

Statement-1: Sky wave signals are used for long distance radio communication. These signals are in general, less stable than g …

The rms value of the electric field of the light coming from the Sun is $720\mathrm{N}/\mathrm{C}$. The average total energy density of the electromagnetic wave is

An electromagnetic wave of frequency $v=3.0$ MHz passes from vacuum into a dielectric medium with permittivity $\epsilon =4.0$. Then