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  1. The number of unused states in a 4 bit Johnson counter is

    2. A.
    2
    B.
    4
    C.
    8
    D.
    12

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    Answer : Option C

    Explanation :

    Total state = 2n = 24 = 16

    Used state = 2n = 2 x 4 = 8

    Unused state = 16 - 8 = 8.

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