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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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The short wave Radio broadcasting band is

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

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

The FM radio broadcasting band is,

Which mode of propagation is used by short wave broadcast services ?.

The mode of propagation used by short wave broadcast services is

The mode of propagation used by short wave broadcast services is

Which mode of propagation is used by short wave broadcast services having frequency range from a few MHz upto 30 MHz ? Explain diagrammatically how long distance communication can be achieved by this mode . Why is there an upper limit to frequency of waves used in this mode ?

(i) Which mode of propagation is used by shortwave broadcast services having frequency range from a few MHz upto MHz ? Explain diagrammatically how long distance communication can be achieved by this mode. (ii) Why is there an upper limit to frequency of waves used in this mode ?

Which one is not a short wave radiation ?

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 :- A. Inside the co...

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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 th...

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

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  9. If there were 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 240m. The distanc...

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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 hei...

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

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  14. In short wave communication, waves of which of the following frequenc...

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

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  16. In frequency modulation

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  17. Range of frequencies alotted for commerical FM radio broad cast 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 a transducer?

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