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  1. If the characteristic equation of a closed loop system is s2 + 2s + 2, then the system is :

    2. A.
    over damped
    B.
    critically damped
    C.
    under damped
    D.
    undamped

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    Answer : Option C

    Explanation :

    1 + G(s) H(s) = 0

    s2 + 2s + 2 = 0

    ξ < 1, under damped.

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