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Long distance short-wave radio broadcast...

Long distance short-wave radio broadcasting uses

A

Ground wave

B

Ionospheric wave

C

Direct wave

D

Sky wave

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The correct Answer is:
B
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Long distance short - wave radio frequency broadcasting uses:

Long distance radio broadcasts use short wave bands. Explain why?

A : Long distance radio broadcasts use short-wave bands. R : Ionosphere reflectes waves in these bands.

Statement 1: Long distance radio broadcasts use short wave bands. Statement 2: Short wavelength signals are reflected by the ionosphere.

Give reasons for the following: (i) Long distance radio broadcasts use short-wave bands. (ii) The small ozone layer on top of the stratosphere is crucial for human survival. (iii) Satellites are used for long distance TV transmission.

Why long distance radio broadcasts use shortwave bands?

ALLEN-SEMICONDUCTORS-Part-3(Exercise-1)
  1. Digital signals (i) do not provide a continuous set of values. (ii...

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  2. An 'antenna' is:

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  3. Long distance short-wave radio broadcasting uses

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  4. The power in a two-wire transmission line travels :-

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  5. For television broadcasting, the frequency employed is normally

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

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

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

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  9. If three wave no atmosphere, the average temperature on the surface of...

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

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  11. Which of the following is used to produce radio waves of constant ampl...

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

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  13. For sky wave propagation of a 10 MHz signal, what should be the minimu...

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  14. In short wave communication waves of which of the following frequeunci...

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  15. For sky wave propagation of a 10 MHz signal, what should be the minimu...

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  16. In frequency modulation

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  17. Range of frequencies allotted for commercial FM radio broadcast is

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  18. Sound produced by a tining fork is a sort of :-

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  19. The space waves which are affected seriously by atmospheric condition ...

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  20. Which of the following is not transducer?

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