Electromagnetic waves are produced by

charges that move with a continuously changing velocity

charges at rest, having the same linear charge density along two mutually perpendicular directions.

equal charges, moving with equal uniform velocities, along two mutually perpendicular directions.

planer rectangular coils having a steady current flowing through them.

charges that move with a continuously changing velocity

An electromagnetic wave, propagating along the x-axis, can be represented by the equations:

$E_y=E_0\sin(kx-\omega t); B_z=B_0\sin(kx-\omega t)$

$E_y=E_0\sin(ky-\omega t); B_z=B_0\sin(kz-\omega t)$

$E_z=E_0\sin(ky-\omega t); B_y=B_0\sin(ky-\omega t)$

$E_y=E_0\sin(kx-\omega t); B_z=B_0\sin(kx-\omega t)$

$E_z=E_0\sin(ky-\omega t); B_y=B_0\sin(kz-\omega t)$

From the following, the only incorrect statement, about EM waves, is the statement:

“EM waves can correspond only to self-sustaining oscillations of electric and magnetic fields in vacuum”.

“We do not need the hypothesis of the (hypothetical) medium ‘the ether’, to understand the production, and propagation, of EM waves”

“EM waves can propagate through material media”.

“The standard, of length, the metre, is defined in terms of the (strictly) constant value of the velocity of EM waves in vaccum”.

The equation $E=E_0\sin(kx-\omega t)$ could represent the oscillations of the electric field of a microwave if k and $\omega$ have the values

$6 \times 10 ^2 \, m ^{-1}$ and $1.8 \times 10 ^{11} \, s ^{-1},$ respectively

$10 ^{10}\, m ^{-1}$ and $3 \times 10 ^{18} \, s ^{-1},$ respectively

$10 ^7 \, m ^{-1}$ and $3 \times 10 ^{15}\, s ^{-1},$ respectively

$6 \times 10 ^2 \, m ^{-1}$ and $1.8 \times 10 ^{11} \, s ^{-1},$ respectively

$6 \times 10 ^{-2}\, m ^{-1}$ and $1.8 \times 10 ^7 \, s ^{-1} ,$ respectively

The SI unit of the poynting vector (S) defined by the formula: $S=\frac{1}{\mu_0}(E\times B)$ is

volt – metre – ampere$^{-1}$

Electromagnetic waves are produced by

charges that move with a continuously changing velocity

An electromagnetic wave, propagating along the x-axis, can be represented by the equations:

$E_y=E_0\sin(kx-\omega t); B_z=B_0\sin(kx-\omega t)$

From the following, the only incorrect statement, about EM waves, is the statement:

“EM waves can correspond only to self-sustaining oscillations of electric and magnetic fields in vacuum”.

The equation $E=E_0\sin(kx-\omega t)$ could represent the oscillations of the electric field of a microwave if k and $\omega$ have the values

$6 \times 10 ^2 \, m ^{-1}$ and $1.8 \times 10 ^{11} \, s ^{-1},$ respectively

Electromagnetic Waves Quiz-1

Electromagnetic waves are produced by

An electromagnetic wave, propagating along the x-axis, can be represented by the equations:

From the following, the only incorrect statement, about EM waves, is the statement:

The equation $E=E_0\sin(kx-\omega t)$ could represent the oscillations of the electric field of a microwave if k and $\omega$ have the values

The SI unit of the poynting vector (S) defined by the formula: $S=\frac{1}{\mu_0}(E\times B)$ is

An electromagnetic wave of frequency v = 3 MHz passes from Vaccum into a dielectric medium with permittivity $\epsilon=4.$ Then wavelength will be

A monochromatic source of power 0.66 kW, and efficiency 100%, emits $10^{20}$ photons is one second. These photons belong to the region of

A point source of electromagnetic radiation has an average power output of 135 W. The maximum value of electric field, at a distance of 3 m from the source, (in $Vm ^{-1}$ ) is

The range of wavelengths allotted for commercial FM radio is

Monochromatic source, of power 4 kW and 100% efficiency produces $10^{20}$ photons every second. The radiations emitted by it belong to the part of the EM spectrum called:

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Electromagnetic Waves Quiz-1

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