Electromagnetic waves practice · Mixed difficulty

What is order of energy of X-rays (${E_X}$), radio waves (${E_R}$) and microwave (${E_M}$)?

The amplitude of the sinusoidally oscillating electric field of plane wave is $60\,\,\frac{V}{m}$. Then the amplitude of the magnetic field is

An EM wave from air enters a medium. The electric fields are ${E_1} = {E_{01}}\hat x\cos \left[ {2\pi v\left( {\frac{z}{c} - t} \right)} \right]$ in air and ${E_2} = {E_{02}}\hat x\cos \left[ {k\left( {2z - ct} \right)} \right]$ in medium, where the wave number k and frequency ν refer to their values in air. The medium is non-magnetic.
If ${\varepsilon _{{r_1}}}$ and ${\varepsilon _{{r_2}}}$ refer to relative permittivities of air and medium respectively, which of the following options is correct?

Electric field in a plane electromagnetic wave is given by $E = 50\sin \,(500x - 10 \times {10^{10}}t)\,v/m.$ The velocity of electromagnetic wave in this medium is
(Given, $c$ = speed of light in vacuum)

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

In an E.M. wave the average energy density is associated with:-

A plane electromagnetic wave of frequency 500 MHz is travelling in vacuum along $y -$direction. At a particular point in space and time, $\overrightarrow B = 8.0 \times {10^{ - 8}}\widehat zT$. The value of electric field at this point is:
(speed of light $= 3 \times {10^8}m{s^{ - 1}}$). $\widehat x,\widehat {\,y},\widehat {\,z}$ are unit vectors along $x,\,y$ and $z$ directions.

An electromagnetic wave is propagating along the $+\mathrm{z}$-axis. Direction of electric and the magnetic field of this wave can be represented by

According to Maxwell’s equation the velocity of light in any medium is expressed as

If $\mu_0$ be the peremeability and $\varepsilon_0$ be the permittivity of a medium, then its refractive index is given by

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

The magnetic field in travelling EM ware has a peak value of 20. The peak value of electric field strength is [in V/m]

Calculate the momentum transferred to a surface when a radiation of energy E falls normally on it. Assume that the reflectivity of the surface is unity.

In a plane electromagnetic wave propagating in space has an electric field of amplitude $9 \times {10^3}\mathrm{\;V}{\mathrm{m}^{ - 1}}$, then the amplitude of the magnetic field is

For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric $({U_e})$ and magnetic $({U_m})$ fields is:

Which of the following rays is emitted by a human body?

Identify the correct statements from the following descriptions of various properties of electromagnetic waves.
(A) In a plane electromagnetic wave electric field and magnetic field must be perpendicular to each other and direction of propagation of wave should be along electric field or magnetic field.
(B) The energy in electromagnetic wave is divided equally between electric and magnetic fields.
(C) Both electric field and magnetic field are parallel to each other and perpendicular to the direction of propagation of wave.
(D) The electric field, magnetic field and direction of propagation of wave must be perpendicular to each other.
(E) The ratio of amplitude of magnetic field to the amplitude of electric field is equal to speed of light.
Choose the most appropriate answer from the options given below

Radiations of intensity 0.5 $W{m^{ - 2}}$are striking a metal plate. The pressure on the plate is

An electron moving with an initial velocity ${V}={V}_0 \hat{{i}}$ in a magnetic field ${B}={B}_0 \hat{{j}}$. Then, its de- Broglie wavelength

$50\mathrm{ W/}{\mathrm{m}^2}$ energy density of sunlight is normally incident on the surface of a solar panel. Some part of incident energy (25%) is reflected from the surface and the rest is absorbed. The force exerted on $\mathrm{1 }{\mathrm{m}^\mathrm{2}}$ surface area will be close to $(c = 3 \times {10^8}{\rm\,\,{m/s)}}$

The wavelength of the short radio waves, micro waves, ultraviolet waves are ${\lambda _1},\,\,{\lambda _2}\,\,\mathrm{and}\,\,{\lambda _3}$ respectively. Arrange them in decreasing order

A plane EMW propagating in the X-direction has a wave length of 60 mm. The electric field is in the y-direction and its maximum magnitude is $33\,V{m^{ - 1}}$. The equation for the electric field as function of $x$ and $t$ is

The amplitude of the magnetic field part of a harmonic Electromagnetic Wave in vacuum is ${B_0}$=510 nT. What is the amplitude of the electric field part of the wave?

Part of electromagnetic spectrum that has largest penetrating power is

Calculate the electric and magnetic fields produced by the radiation coming from a 100 watt bulb at a distance of $3 \mathrm{~m}$. Assume that the efficiency of the bulb is $2.5 \%$ and it is a point source.

X-ray are not used for radar purpose, because they are not

If a charged particle goes unaccelerated in a region containing electric and magnetic fields

In free space, an electromagnetic wave of 3 GHz frequency strikes over the edge of an object of size $\frac{\lambda }{{100}},$ where $\lambda$ is the wavelength of the wave in free space. The phenomenon, which happens there will be:

Identify the mismatched pair in electromagnetic wave spectrum

An electromagnetic wave, going through vacuum is described by $E = {E_0}\sin \left( {kx - \omega t} \right)$. Which of the following is independent of wavelength