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Communication S...

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  • Question 1
    4 / -1

    Broadcasting antennas are generally

  • Question 2
    4 / -1

    For television broadcasting, the frequency employed is normally

  • Question 3
    4 / -1

    The radio waves of frequency 300 MHz to 3000 MHz belong to

  • Question 4
    4 / -1

    An antenna behaves as resonant circuit only when its length is

  • Question 5
    4 / -1

    Maximum usable frequency (MUF) in F-region layer is x, when the critical frequency is 60 MHz and the angleof incidence is 70°. Then x is

  • Question 6
    4 / -1

    The electromagnetic waves of frequency 2 MHz to 30 MHz are used

  • Question 7
    4 / -1

    A laser is a coherent source because it contains

  • Question 8
    4 / -1

    The attenuation in optical fibre is mainly due to

  • Question 9
    4 / -1

    The maximum distance upto which TV transmission from a TV tower of height h can be received is proportional to

  • Question 10
    4 / -1

    A laser beam is used for carrying out surgery because it

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