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Explain sky wave propagation of radiowav...

Explain sky wave propagation of radiowaves.

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Explain skywave propagation of radiowaves.

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PUNJAB BOARD PREVIOUS YEAR PAPERS-Principles of communication-Exercise
  1. Why is ground wave propagation not suitable for high frequency ?

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  2. What is the need for modulation ?

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  3. Draw a labelled block diagram of a basic communication system.

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  4. What is the modulation ? What is need for modulation?

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  5. Explain why sky wave propagation is not possible for high frequency ra...

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  6. What is the need for modulation ?

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  7. Why sky waves are not used in transmission of TV signals?

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  8. Explain sky wave propagation of radiowaves.

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  9. Explain the term ground waves propagation of radio-waves.

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  10. Explain space wave propagation of radiowaves.

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  11. Why sky waves are not used in transmission of TV signals?

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  12. What is difference between sky wave propagation and space wave propaga...

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  13. Why are short waves used in long distance broadcasts ?

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  14. Explain why sky wave propagation is not possible for high frequency ra...

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  15. What is space wave propagation ? Give one example of communication sys...

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  16. Write any two factors, which justify the need of modulation for the tr...

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  17. Explain ground wave propagation of radiowaves.

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  18. What is the need for modulation of a signal ? Give two reasons.

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  19. Draw a labelled block diagram of a basic communication system.

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  20. Define modulation.What is its need ?

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