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The concepts used to measure relative stability are:

(a) Phase margin

(b) Gain margin

(c) Phase and Gain margin

(d) Stable

This question was addressed to me in an interview for internship.

I want to ask this question from Assessment of Relative Stability Using Nyquist Criterion topic in division Stability in Frequency Domain of Control Systems

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Right choice is (c) Phase and Gain margin

The best I can explain: The concepts used to measure relative stability are phase margin and gain margin.

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