List of top Physics Questions on communication systems asked in AIIMS

To double the covering range of a TV transmitter tower, its height should be made

In the transmission of long distance radio signals, short wave band is used. In shorter wavelength, attenuation is very less.

Given below is a circuit diagram of an $AM$ demodulator.

For good demodulation of $AM$ signal of carrier frequency $f$, the value of $R C$ should be :

For sky wave propagation of $10\, MHz$ signal, what should be the minimum electron density in ionosphere?

What should be the maximum acceptance angle at the air-core interface of an optical fibre if $n_1 $ and $n_2$ are the refractive indices of the core and the cladding, respectively?

In short wave communication, waves of which of the following frequencies will be reflected back by the ionospheric layer having electron density $10^{11}$ per $m ^{3}$ ?