Embibe Experts Solutions for Chapter: Electromagnetic Waves, Exercise 3: Level 3

Which among the following does not represent Maxwell’s equation?

Consider the following two statements regarding a linearly polarized, plane electromagnetic wave,

$\left(a\right)$ The electric field and the magnetic field have equal average values.

$\left(b\right)$ The electric energy and magnetic energy have equal average values.

The electric field of an electromagnetic wave travelling through a vacuum is given by the equation $E=E_0\sin (kx-\omega t)$. The quantity that is independent of wavelength is

Correct exposure for a photographic print is $10 \mathrm{s}$ at a distance of one metre from a point source of $20 \mathrm{cd}$. For an equal fogging of the print placed at a distance of $2 \mathrm{m}$ from a $16 \mathrm{cd}$ source, the necessary time for exposure is

The electric field of a plane electromagnetic wave in vacuum is represented by,
$E_x=0, E_y=0.5\cos \left[2\mathrm{\pi }\times {10}^8\left(t-\frac{x}{c}\right)\right]$ and $E_z=0$. Which option is incorrect?

A $160 \mathrm{W}$ infrared source is radiating light of wavelength $50000 \stackrel{°}{\mathrm{A}}$ uniformly in all directions. The photon flux at a distance of $1.8 \mathrm{m}$ is of the order of,

Select the dimensional formula of $\frac{B^2}{2{\mu }_0}.$