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Communication S...

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  • Question 1
    4 / -1

    A carrier is simultaneously modulated by two sine waves with modulation indices of 0.4 and 0.3. The resultant modulation index will be

  • Question 2
    4 / -1

    Mean optical power launched into an 8 km fibre is 120µW and mean output power is 4µW, then the overall attenuation is (Given log 30 = 1.477)

  • Question 3
    4 / -1

    An antenna current of an AM broadcast transmitter modulated by 50% is 11 A. The carrier current is

  • Question 4
    4 / -1

    Because of tilting which waves finally disappear

  • Question 5
    4 / -1

    A study of binary stars is most helpful in

  • Question 6
    4 / -1

    A group of bright and faint stars is called

  • Question 7
    4 / -1

    According to modern astronomers into how many constellations, the whole sky is divided

  • Question 8
    4 / -1

    Which of the following theories is the most satisfactory about the origin of the universe?

  • Question 9
    4 / -1

    Which of the planet is brightest?

  • Question 10
    4 / -1

    A star which appears blue will be

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