Electromagnetic waves practice · Mixed difficulty

An accelerated charge will not produce

Statement I: Displacement current decreases with the increase in frequency of a.c. supplied to the capacitor

Statement II: Reactance due to capacitance is directly proprtional to the frequency of a.c.

The energy density associated with electric field $\vec{E}$ and magnetic field $\vec{B}$ of an electromagnetic wave in free space is given by $\left(\varepsilon_{0}-\right.$ permittivity of free space, $\mu_{0}$ - permeability of free space)

Maxwell in his famous equation of electromagnetism introduced the concept of

Biological importance of Ozone layer is

Part of electromagnetic spectrum that has largest penetrating power is

If value of electric field $E=6.3 \times 10^{27} \mathrm{volt} / \mathrm{m}$ for a electromagnetic wave. The value of magnetic field B will be:

Which of the following can be deflected in magnetic field?

A plane electromagnetic wave ${E_z} = 100\cos \left( {6 \times {{10}^8}t + 4x} \right)V/m$, where x is in metre and t is in second. Propagates in medium , what is refractive index of the medium ?

Cascade theory of showers of Cosmic rays is invented by

For a plane electromagnetic wave, average of which among the following is zero?

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

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:

An electromagnetic wave of intensity $50\,\,W{m^{ - 2}}$ enters in a medium of refractive index ‘n’ without any loss. The ratio of the magnitudes of electric fields and the ratio of the magnitudes of magnetic fields of the wave before and after entering into the medium are respectively, given by

An earth orbiting satellite has solar energy collecting panel with total area $5\mathrm{\;}{\mathrm{m}^2}$. If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is
(Solar constant$= 1.4\mathrm{\;kW}{\mathrm{m}^{ - 2}}$)

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:

Statement I: A changing electric-field produces a magnetic field.

Statement II: A changing magnetic field produces an electric field.

Suppose that the electric field part of an electromagnetic wave in vacuum is $\vec{E}=(3.1 \mathrm{~N} / \mathrm{C}) \cos \left[(1.8 \mathrm{~rad} / \mathrm{m}) y+\left(5.4 \times 10^8 \mathrm{~rad} / \mathrm{s}\right) {t}\right] \hat{i}$. What is the frequency ${v}$?

The ultra high frequency band of radiowaves in electromagnetic wave is used as in

The percentage power of $\mathrm{X}$-ray increases with the increases in its

The speed of electromagnetic wave in vacuum depends upon the source of radiation

If $\mathrm{v}_{\mathrm{s}}, \mathrm{v}_{\mathrm{x}}$ and $\mathrm{v}_{\mathrm{m}}$ are the speed of soft gamma rays, $\mathrm{X}$-rays and microwaves respectively in vacuum, then

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

The magnetic field between the plate of a capacitor when $r < R$ is given by

The wave impedance of free space is

Assuming that universe is expanding, if the spectrum of light coming from a star which is going away from earth is tested, then in the wavelength of light

Arrange the following electromagnetic radiations per quantum in the order of increasing energy.
A. Blue light
B. Yellow light
C. X-ray
D. Radio wave

The reative permeability of glass is 3/8 and the dielectric constant of glass is 8. The refractive index of glass is

Rays in electromagnetic spectrum that has lowest frequency are

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.