A plane electromagnetic wave of frequency $35\ \mathrm{MHz}$ travels in free space along the $\mathrm{X}$-direction.
At a particular point (in space and time) $\overrightarrow{\mathrm{E}}=9.6\ \hat{\mathrm{j}} \mathrm{V} / \mathrm{m}$. The value of magnetic field at this point is:
$3.2 \times 10^{-8} \ \hat{\mathrm{k}} \mathrm{T}$
$3.2 \times 10^{-8}\ \hat{\mathrm{i}}$
$9.6 \ \hat{\mathrm{j}} \mathrm{T}$
$9.6 \times 10^{-8}\ \hat{\mathrm{kT}}$
The magnetic field of a beam emerging from a filter facing a floodlight is given by B${B_0} = 12 \times {10^{ - 8}}\,\sin \,(1.20 \times {10^7}\,z - 3.60 \times {10^{15}}t)T$. What is the average intensity of the beam ?
The electric field of a plane electromagnetic wave propagating along the $x$ direction in vacuum is $\overrightarrow{ E }= E _{0} \hat{ j } \cos (\omega t - kx )$. The magnetic field $\overrightarrow{ B },$ at the moment $t =0$ is :
In propagation of electromagnetic waves the angle between the direction of propagation and plane of polarisation is
In an electromagnetic wave in free space the root mean square value of the electric field is $E_{rms} = 6\, V m^{-1}$ The peak value of the magnetic field is
A light beam is described by $E=800 \sin \omega\left(t-\frac{x}{c}\right)$
An electron is allowed to move normal to the propagation of light beam with a speed of $3 \times 10^{7}\;{ms}^{-1}$. What is the maximum magnetic force exerted on the electron ?