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While increasing the value of gain K, the system becomes

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While increasing the value of gain K, the system becomes

(a) Less stable

(b) More stable

(c) Unstable

(d) Absolute stable

The question was posed to me in a job interview.

This question is from The Root Locus Concepts in division The Root Locus Technique of Control Systems

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Right answer is (a) Less stable

The explanation: Damping factor is inversely proportional to gain on increasing gain it reduces hence makes the system less stable.

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