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Communication satellites revolve at a he...

Communication satellites revolve at a height of (over earth’s surface) ,

A

6 Re

B

5 Re

C

7 Re

D

None of these

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The correct Answer is:
A
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MOTION-COMMUNICATION SYSTEM-EXERCISE - 2
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  2. The velocity of electromagnetic waves in a dielectric medium (in(r)=4)...

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  3. If refractive index of core & cladding are mu(1)&mu(2) respectively th...

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  4. If critical frequency is 40 MHz then calculate maximum density of elec...

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  5. Communication satellites revolve at a height of (over earth’s surface)...

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  6. The distance between consecutive maxima and minima is given by-

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  7. Through which mode of propagation, the radio waves can be sent from on...

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  8. The frequencies of electromagnetic waves employed in space communicati...

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  9. The wavelength of electromagnetic waves employed for space communicati...

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  10. The ratio waves of frequency 300 MHz to 3000 MHz belong to

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  11. The maximum range of ground or surface wave propagation depends on-

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  12. In which frequency range, space waves are normally propagated?

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  13. For television broadcasting, the frequency employed is normally

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  14. The sound waves after being converted into electrical waves are not tr...

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  15. The process of superimposing signal frequency (i.e. audio wave) on the...

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  16. In an amplitude modulated wave for audio frequency of 500 "cycle"//sec...

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  17. The T.V. transmission tower in Delhi has a height of 240 m. The distan...

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