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  • Question 1
    4 / -1

    The critical frequency of player is 50 MHz when angle of incidence is 74o What is the maximum unable frequency ?

  • Question 2
    4 / -1

  • Question 3
    4 / -1

    How long will it take to transmit the information 30km away in space ?

  • Question 4
    4 / -1

    What is the velocity of electromagnetic wave in a good conductor ?

  • Question 5
    4 / -1

    If 'fm' is the modulation frequency in Fm the modulation index is proportional to

  • Question 6
    4 / -1

    For 100% modulation, What is the value of minimum amplitude ( Emin ) of the modulated wave ?

  • Question 7
    4 / -1

    When electromagnetic waves enter the ionised layer of ionosphere, the relative permitting of the ionised layer

  • Question 8
    4 / -1

    In which of the following media the wave propagation occurs with out attenuation ?

  • Question 9
    4 / -1

    The step index fibre has a relative refractive index difference of 0.86% what is the critical angle at the core cladding interface ?

  • Question 10
    4 / -1

    A silicon optical fibre has a core refractive index of 1.50 and a cladding refractive index 1.47 what is the numerical aperture of the fibre ?

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