Menu
Home / ECE / Exam Questions Paper :: Discussion

Discussion :: Exam Questions Paper

  1. The amplitude modulated wave is given by __________ e = 25(1 + 0.7 cos 5000t - 0.3 cos 1000t) x sin 5 x 106t The amplitude of carrier and sideband frequencies in magnitudes are

    2. A.
    25, 0.7, 0.3
    B.
    25, 0.7, - 0.3
    C.
    24, 17.5, 7.5
    D.
    25, 8.75, 3.75

    View Answer

    Workspace

    View Answer

    Answer : Option D

    Explanation :

    Modulation index is 0.7 and 0.3 so that amplitude of signal is 0.7 x 25 = 17.5 and 0.3 x 25 = 7.5

    On modulation the sideband amplitude is .

    Hence 8.75 and 3.75

Write your comments here:

Be The First To Comment