Electromagnetic Wave and their Characteristics

An electromagnetic wave is travelling in a medium with a velocity $\overrightarrow{v}=v\widehat{i}$ . The electric field oscillations, of this electromagnetic wave wave, are along the y – axis.

(a) Identify the direction in which the magnetic field oscillations are taking place, of the electromagnetic wave wave.

(b) How are the magnitudes of the electric and magnetic fields in the electromagnetic wave related to each other?

In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of $2.0\times {10}^{10} \mathrm{Hz}$ and amplitude $48 \mathrm{V} {\mathrm{m}}^{-1}$. Then the amplitude of oscillating magnetic field is: (Speed of light in free space =$3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$)

Electromagnetic waves travelling in a medium having relative permeability ${\mathrm{\mu }}_{\mathrm{r}}=1.3$ and relative permittivity ${\epsilon }_r=2.14$ . The speed of electromagnetic waves in the medium must be 

The electric field of a plane electromagnetic wave propagating along the z-axis varies with time with an amplitude of $2\mathrm{ }\mathrm{V} {\mathrm{m}}^{-1}$. The average energy density of the magnetic field (in $\mathrm{J}\mathrm{ }{\mathrm{m}}^{-3}$) is :

Take: ${\mathrm{\epsilon }}_0=8.854\times {10}^{-12} \mathrm{F} {\mathrm{m}}^{-1}$

Which of the following pairs of space and time-varying $E$ and $B$ fields would generate a plane electromagnetic wave travelling in the $(+x)$ direction?

Wavelength of EM waves varies from ______ to ________

The electric field of a plane electromagnetic wave varies with time with an amplitude of $2\mathrm{ }\mathrm{V} {\mathrm{m}}^{-1}$ propagating along $z$ -axis. The average energy density of the magnetic field (in $\mathrm{J}\mathrm{ }{\mathrm{m}}^{-3}$ ) is (Take: ${\mathrm{\epsilon }}_0=8.854\times {10}^{-12} \mathrm{F} {\mathrm{m}}^{-1}$)

The amplitude of the magnetic field of a harmonic electromagnetic wave in vacuum is $B_0=510 \mathrm{n}\mathrm{T}$. The amplitude of the electric field part of the wave is

The spectrum of an oil flame is an example of

If ${\nu }_g, {\nu }_X$ and ${\nu }_m$ are the wave speeds of gamma rays, $\mathrm{X}-$ rays and microwaves respectively in vacuum, then

Suppose that the electric field part of an electromagnetic wave in a vacuum is $\mathrm{E}=(3.1 \mathrm{N}/\mathrm{C})\hspace{0.17em}\cos \left[\right(1.8 \mathrm{rad}/\mathrm{m})\mathrm{y} +\hspace{0.17em}(5.4 \times {10}^6 \mathrm{rad}/\mathrm{s}\left)\mathrm{t}\right] \hat{\mathrm{i}}$ . What is the frequency?

The oscillating magnetic field in a plane electromagnetic wave is given by $B_y=8\times {10}^{-6} \sin [2\times {10}^{11}t +\hspace{0.17em}300 \pi x] \mathrm{T}$. Calculate the wavelength of the electromagnetic wave. 

If the amplitude of the magnetic field is $3\times {10}^{-6} \mathrm{T}$, then amplitude of the electric field for an electromagnetic waves is

Which of the following are false for electromagnetic waves

Consider an oscillator which has a charged particle and oscillates about its mean position with a frequency of $300 \mathrm{MHz}$. The wavelength of electromagnetic waves produced by this oscillator is

Which of the following is an electromagnetic wave?

Which one of them is used to produce a propagating electromagnetic wave?

Let $E=E_0 \sin [ {10}^{6}x -\omega t]$ be the electric field of plane electromagnetic wave, the value of $\omega$ is

Which of the following is not true for electromagnetic waves