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Which of the following statements is inc...

Which of the following statements is incorrect

A

The space waves are the radiowaves of frequency between 30 MHz to 300 MHz

B

The space waves can travel through atmosphere from transmitter antenna to receiver antenna either directly or after reflection from ground in the earth's troposphere region.

C

the space wave propagation is not a sight propagation

D

The space wave communication utilized in television communication, radar communication and microwave communication

Text Solution

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The correct Answer is:
C
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RESONANCE ENGLISH-COMMUNICATION SYSTEM-Exercise
  1. For a carrier frequency of 100 kHz a modulating frequency of 5 kHz. Wh...

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  2. Intelset satellite works as a -

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  3. The frequency band used for radar relay systems and television-

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  4. Fading applies to:

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  5. When microwave signals follow the curvature of earth, this is known as...

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  6. the transmission media can be

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  7. In A.M., total modulation index should not exceed one or else:

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  8. An 'antenna' is

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  9. The radio waves of frequency 30 MHz to 300 MHz belong to

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  10. In an amplitude modulated wave for audio frequency of 500 cycles/secon...

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  11. A TV. Tower has a height 150 m.What is the population density around t...

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  12. Range of frequencies alotted for commerical FM radio broad cast is

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  13. The maximum distance upto which TV transmission from a TV tower of hei...

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  14. An oscillator is producing FM waves of frequency 2 kHz with a variatio...

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  15. Consider telecommunication through optical fibers. Which of the follow...

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  16. Television signals on earth cannot be received at distances greater th...

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  17. An amplitude is frequency graph of a frequency medulatal wave is given...

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  18. Which of the following statements is incorrect

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  19. Which of the following statements is false?

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  20. Optical fibers are the best medium of transmission over copper wires, ...

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