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Control system miscellaneous

  1. The system shown in the figure remains stable when

    1. K < – 1
    2. – 1 < K < 1
    3. 1 < K < 3
    4. K > 3
Correct Option: D

Y(s)
=
K
R(s)s - 3 + K

The system will stable, when single pole lies in the RH-s plane, i.e.
K – 3 > 0
⇒ K > 3



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