Physics Electromagnetic Waves

The energy that will be ideally radiated by a $100\mathrm{k}\mathrm{W}$  transmitter in 1 hour is

When light propagates through a material medium of relative permittivity ${\epsilon }_{\mathrm{r}}$ and relative permeability ${\mu }_{\mathrm{r}}$ , the velocity of light, $\mathrm{v}$ is given by : ( $\mathrm{c}$  - velocity of light in vacuum)

A TV transmission tower antenna is at a height of 20m. Suppose that the receiving antenna is at
(i) ground level
(ii) a height of 5m
The increase in the antenna range in case (ii) relative to case (i) is n %.
The value of n, to the nearest integer, is.

A plane electromagnetic wave propagating along y-direction, can have the following pair of electric field (E) and magnetic field (B) components :

The electric field intensity produced by the radiation coming from a 100W bulb at a distance of 3 m is E. The electric field intensity produced by the radiation coming from 60 W at the same distance is √(x/5) E. Where the value of x = ______.

A plane electromagnetic wave of frequency 100 MHz is traveling in vacuum along the x-direction. At a particular point in space and time, B = 2.0 * 10? k? T. (where, k? is unit vector along z-direction) What is E at this point? (speed of light c = 3 x 10? m/s)

If 2.5*10^-9 N average force is exerted by a light wave on a non- reflecting surface of 30 cm² area during 40 minutes of time span, the energy flux of light just before it falls on the surface is . W / cm². (Round off to the Nearest Integer) (Assume complete absorption and normal incidence conditions are there)

An electron is constrained to move along the y-axis with a speed of 0.1c (c is the speed of light) in the presence of electromagnetic wave, whose electric field is E = 30ĵsin(1.5 × 10⁷t - 5 × 10⁻²x)V/m. The maximum magnetic force experienced by the electron will be: (given c = 3 × 10⁸ ms⁻¹ and electron charge = 1.6 × 10⁻¹⁹C )

The electric field of a plane electromagnetic wave is given by E⃗ = E₀(x̂ + ŷ)sin(kz – ωt)
Its magnetic field will be given by:

For a plane electromagnetic wave, the magnetic field at a point x and time t is B(x, t) = [1.2 * 10?sin(0.5 * 10³x + 1.5 * 10¹¹t)k]T
The instantaneous electric field E corresponding to B is: (speed of light c = 3 * 10? ms?¹)