The polar plot of a transfer function passes through the critical point (-1,0).Gain margin is(a) zero(b) -1dB(c) 1dB(d) InfinityI had been asked this question in an online interview.Question is taken from Stability Analysis by Describing Functions in chapter Nonlinear Systems of Control Systems

The polar plot of a transfer function passes through the critical poin

1.	The polar plot of a transfer function passes through the critical point (-1,0).Gain margin is(a) zero(b) -1dB(c) 1dB(d) InfinityI had been asked this question in an online interview.Question is taken from Stability Analysis by Describing Functions in chapter Nonlinear Systems of Control Systems
Answer» RIGHT answer is (a) zero The explanation is: Gain margin is the POINT where the at phase cross over frequency gain of the system i 1 DB andof a POLAR PLOT passing through the critical point is zero.

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The polar plot of a transfer function passes through the critical point (-1,0).Gain margin is(a) zero(b) -1dB(c) 1dB(d) InfinityI had been asked this question in an online interview.Question is taken from Stability Analysis by Describing Functions in chapter Nonlinear Systems of Control Systems

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