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Discussion :: Automatic Control Systems

  1. A thermometer requires 1 minute to indicate 98% of its final response to a step input. If it is a first order system the time constant is

    2. A.
    1 minute
    B.
    0.5 minute
    C.
    0.25 minute
    D.
    0.1 minute

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    Answer : Option C

    Explanation :

    0.98 = 1 - e-1/T or T = 0.25 minute.

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