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If the gain of the open-loop system is doubled, the gain margin

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If the gain of the open-loop system is doubled, the gain margin

(a) Is not affected

(b) Gets doubled

(c) Becomes half

(d) Becomes one-fourth

I had been asked this question during an interview.

I'm obligated to ask this question of Polar Plots in portion Frequency Response Analysis of Control Systems

1 Answer

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Best answer
Correct answer is (a) Is not affected

Easy explanation: If the gain of the open-loop system is doubled, the gain margin gets doubled.

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