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Disucss briefly the three modes of propa...

Disucss briefly the three modes of propagation of electromagnetic wave.

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BINA LIBRARY-COMMUNICATION SYSTEM -EXERCISE
  1. What are the different transmission media for communication?

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  2. Define the term noise used in electronic communication

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  3. Disucss briefly the three modes of propagation of electromagnetic wave...

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  4. Why is modulation necessary?

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  5. What is amplitude modulation? Explain with diagram.

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  6. What sign (+ve or-ve) is given to the focal length of a convex mirror?

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  7. For long distance radio broadeast, we use short wave only. Why?

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  8. Why satellites are used for long distance TV transmission.

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  9. in what respects radio waves and gamma rays are different ?

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  10. Why sky wave are not used in television signals.

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  11. expalin why Tv transmission are usually made high .

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

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

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

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

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

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

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

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

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

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