Electromagnetic waves practice · Mixed difficulty

The amplitude of electric field in a parallel beam of light of intensity $4\mathrm{\;W}{\mathrm{m}^{ - 2}}$ is

If a charge particle of charge $2 \mu {C}$ and mass $1 {gm}$ is released at origin in gravity free space having $\vec{E}=E_0 \hat{j}$ and $\vec{B}=-B_0 \hat{j}$

$\left(E_0=10^3 {~N} / {C}\right.$ and $\left.B_0=5 {~T}\right)$, then its speed

Light with energy flux of $24\,w/{m^2}$ is incident on a well polished disc of radios 3.5 cm for one hour. The momentum transferred to the disc is [in kgm ${s^{ - 1}}$]

Radio wave diffract around building although light waves do not. The reason is that radio waves

In an EMW in free space the root mean square value of the electric field is ${E_{rms}} = 6\,\frac{V}{m}$. The peak value of the magnetic field is [in Tesla]

In a place e.m. wave, the electric field oscillates sinusoidally at a frequency of $2.5 \times 10^{10} {~Hz}$ and amplitude $480 {~V} / {m}$. The amplitude of oscillating magnetic field will be :-

Assertion: The microwaves are better carriers of signals than radio waves.

Reason: The electromagnetic waves do not require any medium for propagation.

Rays in electromagnetic spectrum that has shortest wavelength are

Light with energy flux of $18\frac{W}{{c{m^2}}}$ falls on a non-reflecting surface of area $20\,\,c{m^2}$ at normal in cadence the momentum delivered in 30 minutes is [in kgm/s]

For an electromagnetic wave traveling in free space

Displacement Current is:

The S.I. unit of displacement current is:

An electromagnetic wave travelling along ${z}$-axis is given as: $\vec{E}=\vec{E}_0 \cos (k z-\omega t)$. Choose the INCORRECT options from the following;

A plane electromagnetic wave is propagating along the direction $\frac{{\hat i + \hat j}}{{\sqrt 2 }}$ with its polarization along the direction $\hat k.$ The correct form of the magnetic field of the wave would be (here ${B_0}$ is an appropriate constant)

The magnetic field $B$ and electric field $E$ in an electromagnetic wave are:

In an Electromagnetic Wave, direction of propagation is in the direction of

In a medium of dielectric constant $K$, the electric field is $\mathbf{E}$. If ${\varepsilon _0}$ is permittivity of the free space, the electric displacement vector is

If a long hollow copper pipe carries a direct current, the magnetic field associated with the current will be

Let the velocities of light in vacuum and glass are represented by $v$ and $v_{\mathrm{g}}$. When electrons move through glass with a velocity $v_e$, there emitted a visible radiation in glass if

The average value of electric energy density in an Electromagnetic Waves is (${E_0}$ is peak value)

The energy of an electromagnetic wave contained in a small volume oscillates with

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

A proton moving with a constant velocity passes through a region of space without any change in its velocity. If $\vec{E}$ and $\vec{B}$ represent the electric and magnetic fields respectively, then the region of space may have:

(A) $E=0, B=0$

(B) $E=0, B \neq 0$

(C) $E \neq 0, B=0$

(D) $E \neq 0, B \neq 0$

Choose the most appropriate answer from the options given below:

The ratio of average electric energy density and total average energy density of electromagnetic wave is

An alternating voltage (in volts) $=100 \sqrt{2} \sin 100 t$ is connected to one microfarad capacitor. The reading of the ammeter shall be

A parallel plate capacitor is charged to $60\mathrm{\mu C}$. Due to a radioactive source, the plate loss charge at the rate of $1.8\mathrm{\;} \times \mathrm{\;}{10^{ - 8}}\mathrm{\;C}{\mathrm{s}^{ - 1}}.$ The magnitude of displacement current is

If $\overrightarrow E \,\,\mathrm{and}\,\,\overrightarrow B$ are the electric and magnetic field vectors of E.M waves then the direction of propagation of E.M wave is along the direction of

An electromagnetic wave is travelling to the east. At one instant at a given point its E vector points straight up. What is the direction of is B vector ?

The wave function (in S.I units) for an electromagnetic wave is given as $- \psi \left( {X,t} \right) = {10^3}\sin \pi \left( {3 \times {{10}^6}X - 9 \times {{10}^{14}}t} \right)$. The speed of wave is :

A plane electromagnetic wave travels in a medium of relative permittivity 2 and relative permeability $8.0.$ If the magnitude of magnetic intensity is $\frac{6}{\pi} \times 10^{-2} \mathrm{~A} / \mathrm{m}$ at a point, then the electric field at that point in ___ $\mathrm{V} / \mathrm{m}$.