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Discussion :: Automatic Control Systems

  1. Consider the following statements:
    The gain margin and phase margin of an unstable system may respectively be

    1. positive, positive
    2. positive, negative
    3. negative, positive
    4. negative, negative
    Of these statements

    2. A.
    1, 4 are correct
    B.
    1 and 2 correct
    C.
    1, 2, 3 are correct
    D.
    2, 3, 4 are correct

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    Answer : Option D

    Explanation :

    For stable system both must be positive.

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