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why high frequency carrier waves are emp...

why high frequency carrier waves are employed for transmission ?

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BINA LIBRARY-COMMUNICATION SYSTEM -EXERCISE
  1. Why sky wave are not used in television signals.

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  2. expalin why Tv transmission are usually made high .

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  3. why high frequency carrier waves are employed for transmission ?

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  4. why is short wave communication over long distance not possible by sur...

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  5. A radio can turn to any station in 7.5HZ TO 12MZband . What is the cor...

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  6. The maximum peak volatage of an AM wave is 20 mV . If the modulating i...

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  7. Find the length of a dipole antenna at frequency 10KHZ.

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  8. what should be the height of a transmitting antenna if TV telecast is ...

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  9. How many telephone channels each allotted to a band width of 8HZ can b...

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  10. calculate the length of half wave dipole antenna a) 30MHz b)300MHz c...

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  11. A TV tower has a height of 100m how much population is covered by the ...

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  12. What is an optically rarer medium?

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  13. The process of superimposing signal frequency on carrier wave is known...

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  14. The purpose of oscillator in AM transmitter is to

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  15. The electromagnetic waves of frquency range 2MHz to 30MHz are in

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  16. Radio waves of constant amplitude can be generated with

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  17. In which frequency range space waves are normally propagated ?

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  18. For Long distance radio broadcasting uses

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  19. The radio waves of frquency 300MHz to 3000MHz belong t

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  20. For televsion broadcasting the frequency employed is normally in the r...

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