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

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

The frequency band of standard amplitude modulated broadcast is

If the peak voltage of message signal is \(60\%\) less than the peak voltage of the carrier wave, then the modulation index is

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

Approximate bandwidth required to transmit music is:

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

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)