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Long distance short-wave radio broadcast...

Long distance short-wave radio broadcasting uses

A

ground wave

B

ionospheric waves

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?

FIITJEE-SEMICONDUCTOR AND DEVICE-SOLVED PROBLEMS Objective: Level-I
  1. The velocity of electromagnetic waves in a dielectric medium (in(r)=4)...

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  2. For television broadcasting, the frequency employed is normally

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  3. An 'antenna' is:

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  4. The characteristic impedance of a coaxial cable is of the order of

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  5. Long distance short-wave radio broadcasting uses

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  6. Propogation constant of a transmission line is :

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

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  8. The number of telephone conversations by a fibre of band width 40MHz, ...

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  9. Distance of propogation from antenna of height 20m is

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  10. If critical frquency for ionosphere is 30MHz.Calculate the maximum fre...

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  11. The velocity of electromagnetic waves in a dieclectric medium (epsilo...

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  12. For television broadcasting, the frequency employed is normally.

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  13. An antenna is :

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  14. The characteristic impedance of a co-axial cableis of the order of:

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  15. Long distance short - wave radio frequency broadcasting uses:

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  16. Propogation constant of a transmission line is :

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  17. The T.V.Transmission tower in Delhi has a height of 240m. The distnace...

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    |

  18. The number of telephone conversations by a fibre of band width 40MHz, ...

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    |

  19. Distance of propogation from antenna of height 20m is

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  20. If critical frquency for ionosphere is 30MHz.Calculate the maximum fre...

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    |