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Television signal on earth cannot be rec...

Television signal on earth cannot be recevied at distances greater than `100 km` from the transmission station. The reasion behind this is that

A

the receiver antenna is unable to detect the signal at a disance greater than 100 km

B

the TV programme consists of both audio and video signals

C

the TV signals are less powerful than radio signals

D

the surface of earth is curved like a sphere

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The correct Answer is:
D
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DISHA PUBLICATION-COMMUNICATION SYSTEM -EXERCISE-2 : Concept Applicator
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  2. Sinusoidal carrier voltage of frequency 1.5 MHz and amplitude 50 V ...

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  4. When radio waves passes through ionosphere, phase difference between s...

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  5. The electron density of a layer of ionosphere at a height 150 km from ...

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  6. In optical communication system operating at 1200nm, only 2% of the so...

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  7. A radiostation has two channels. One is AM at 1020 kHz and the other F...

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  8. Antennas are used to receive and transmit

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  9. An AM wave is expressed as e=10(1+0.6cos2000pit)cos2xx10^(8)pit "volts...

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  10. Calculate the power developed by an amplitude modulated wave in a load...

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  11. 12 signals each band limited to 5 kHz are to be transmitted by frequen...

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  12. In a radar system, peak transmitted power is increased a factor of 81 ...

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  13. A carrier frequency of 10kV at 1 MHz is amplitude modulated by a 1 kHz...

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  14. A 1000 kHz carrrier is simultaneously modulated with 300Hz, 800Hz and ...

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  15. A 10 kW carrier is sinusoidally modulated by two carriers correspondin...

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  16. An FM signal has a resting frequency of 105MHz and highest frequency o...

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  17. A super heterodyne receiver is designed to receive transmitted signals...

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  18. Consider the following amplitude modulated (AM) signal, where fm lt B ...

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  19. An AM - signal is given as x(AM) (t) = 100[ p (t) + 0.5g (t) ] cos o...

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