List of top Physics Questions on communication systems asked in AP EAPCET

If the wavelength of the signal to be transmitted by an antenna is increased by \(2\) times, then the effective power radiated by the antenna

A TV transmitting antenna is 81 m tall. Service area covered, if the receiving antenna is at the ground level, will be about:

A TV tower has a height of 100m. To double the coverage distance of the tower, the height of the tower must be increased by:

In a signal transmission, if the amplitude of the carrier wave is 10 V and the modulation index is 0.6, then the amplitude of the side bands is:

A message signal of frequency \(8\ \text{kHz}\) and peak voltage \(12\ \text{V}\) is used to modulate a carrier of frequency \(1.2\ \text{MHz}\) and peak voltage \(20\ \text{V}\). The modulation index is

The frequency suitable for beyond the horizon communication using sky wave is

The frequency band for downlink satellite communication is in the range:

A TV transmitting antenna is 70 m tall. If the receiving antenna is at ground level, then the area it can cover is: (Radius of Earth = 6400 km)

A radio antenna receiver works at \((10.5 \pm 4.5)\,MHz\) with an effective bandwidth of \(9\,MHz\). The corresponding wavelength bandwidth is:

For an amplitude modulated (AM) wave, the minimum amplitude is 4.0 V and the modulation index is 0.4. The maximum amplitude is:

A carrier wave of peak voltage \(60\,\text{V}\) is used to transmit a message signal. Then the peak voltage of the modulating signal in order to have a modulation index of \(90\%\) is