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Discussion :: Communication Systems

  1. In a CD player the speed of CD is

    2. A.
    constant at 500 rpm
    B.
    constant at 200 rpm
    C.
    varies from 200 to 500 rpm
    D.
    none of the above

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    Answer : Option C

    Explanation :

    Since the circumference of outer tracks is more than that of tracks near the centre, the speed of disc is varied from 200 rpm to 500 rpm.

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