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: