Electromagnetic waves practice · Medium

Intensity of sunlight is observed as $0.092\,W{m^{ - 2}}$ at a point in free space. What will be the peak value of magnetic field at that point? $({\varepsilon _0} = 8.85 \times {10^{ - 12}}{C^{ - 2}}{N^1}{m^{ - 2}})$

Phase difference between electric field and magnetic field associated with a plane
polarized light is

Assertion: Electromagnetic waves interact with matter and set up oscillations.
Reason: Interaction is independent of the wavelength of the electromagnetic waves.

The magnetic field between the plates of a parallel plate capacitor is given by: $B=\frac{\mu_0 I r}{2 \pi R^2}$, when

Calculate the average energy density of an electromagnetic wave whose electric field is oscillating with amplitude $50 \mathrm{~v} / \mathrm{m}$ and frequency $5 \times 10^{10} \mathrm{~Hz}$.

A laser gun of power $3 \mathrm{~mW}$ and mass $50 \mathrm{~gm}$ emits photons of wavelength $500 \mathrm{~nm}$. It is in gravity free space and emits for one hour. Find the distance covered by gun due to recoil in this one hour (approx.) :-

If an electromagnetic wave is propagation in a medium with permeability $\mathrm{\varepsilon }$ and permittivity $\mathrm{\mu }$, then $\sqrt {\frac{\mathrm{\mu }}{\mathrm{\varepsilon }}}$ is the

A capacitor having a capacity of 2 pF. Electric field across the capacitor is changing with a value of ${10^{12}}\mathrm{\;V}{\mathrm{s}^{ - 1}}$. The displacement current is

The existence of electromagnetic waves was theoretically predicted by

A plane electromagnetic wave is incident on a material surface. If the wave delivers momentum $p$ and energy $E$, then

The frequency $1057 \mathrm{~MHz}$ of radiation arising from two close energy levels in hydrogen belongs to

A charged particle enters a uniform magnetic field with a velocity vector at an angle of $45^\circ$ with the magnetic field. The pitch of the helical path followed by the particle is p. The radius of the helix will be

The dielectric constant of air is 1.006. The speed of electromagnetic wave travelling in air is $a \times {10^8}\;m{s^{ - 1}}$, where a is about

An electromagnetic wave can be produced, when charge is

A plane electromagnetic wave is incident on a plane surface of area A, normally and is perfectly reflected. If energy E strikes the surface in time t then average pressure exerted on the surface is ( $\mathrm{c}=$ speed of light)

A charged particle moving with constant acceleration produces