GATE Electronics and Communications (EC) 2016 Shift 1 Solved Paper

Question : 30 of 65

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A closed-loop control system is stable if the Nyquist plot of the corresponding open-loop transfer function

Encircles the s-plane point (−1 + j0) in the counterclockwise direction as many times as the number of right-half s-plane poles.
Encircles the s-plane point (0 − j1) in the clockwise direction as many times as the number of right-half s-plane poles.
Encircles the s-plane point (−1 + j0) in the counterclockwise direction as many times as the number of left-half s-plane poles.
Encircles the s-plane point (−1 + j0) in the counterclockwise direction as many times as the number of right-half s-plane zeros.

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