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  1. A 200 Hz sound wave is to be transmitted by a 1000 kHz radio wave using frequency modulation. The instantaneous frequency variation will be

    2. A.
    100 times a second
    B.
    200 times a second
    C.
    400 times a second
    D.
    1000 times a second

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    Answer : Option B

    Explanation :

    The instantaneous frequency variation is equal to frequency of audio signal.

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