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  1. Bode plots of an open-loop transfer function of a control system are shown in the given figure. The gain margin of the system is—


    1. K
    2. – K
    3. 1/K
    4. – 1/K
Correct Option: A

Assuming constant multiple in the open-loop transfer function to be 1, the gain margin
= K (As clearly seen from the given figure)



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