List of top Physics Questions on communication systems asked in TS EAMCET

For an amplitude modulated wave, if the maximum amplitude is \(400%\) more than its minimum amplitude, then the modulation index is

The layer of the atmosphere that efficiently reflects high frequency waves particularly at night is:

Approximate bandwidth required to transmit music is:

The frequency band of standard amplitude modulated broadcast is

If the frequencies of the carrier wave and message signal are $1$ MHz and $28$ kHz respectively, then the frequencies of the side bands are

The layer of the atmosphere which efficiently reflects high frequency waves particularly at night is

If the maximum and minimum amplitudes of an amplitude modulated wave are 9 V and 3 V respectively, then the modulation index is

The height of a television transmitting antenna is 70 m. If the receiving antenna is at the ground level, then the service area covered by the transmitting antenna is nearly (Radius of the earth = 6400 km)

Optical communication using fibres is performed in the frequency range of:

When the receiving antenna is on the ground, the range of a transmitting antenna of height 980 m is (Radius of the earth = 6400 km)