Maharashtra Board Solutions for Chapter: Electromagnetic Waves and Communication System, Exercise 2: Exercises

Can we produce a pure electric or magnetic wave in space? Why?

Why does amplitude modulation give noisy reception?

Calculate the wavelength (in $\mathrm{cm}$) of a microwave of frequency $8 \mathrm{GHz}$.​

In an EM wave, the electric field oscillates sinusoidally at a frequency of $2\times {10}^{10} \mathrm{Hz}$. What is the wavelength of the wave (in meters)?

The amplitude of the magnetic field part of a harmonic EM wave in vacuum is $5\times {10}^{-7 }\mathrm{T}$. What is the amplitude of the electric field part of the wave (in $\mathrm{V} {\mathrm{m}}^{-1}$)?

A TV tower has a height of $200 \mathrm{m}$. How much population is covered by the TV broadcast, if the average population density around the tower is $1000 {\mathrm{Km}}^{-2}$. Given Radius of the earth is $6.4\times {10}^6 \mathrm{m}$.
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Height of a TV tower is $600 \mathrm{m}$ at a given place. Calculate its coverage range if the radius of the Earth is $6400 \mathrm{km}$. What should be the height to get the double coverage area?

A transmitting antenna at the top of a tower has a height of 32 m and the height of the receiving antenna is 50 m. What is the maximum distance between them, for satisfactory communication in Line of Sight (LOS) mode? ( Radius of earth = 6400 km)