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If the gain of the open loop system is doubled, the gain of the system is :

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If the gain of the open loop system is doubled, the gain of the system is :

(a) Not affected

(b) Doubled

(c) Halved

(d) One fourth of the original value

This question was posed to me in an interview.

This is a very interesting question from Frequency Response topic in section Frequency Response Analysis of Control Systems

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Correct option is (a) Not affected

The explanation: Gain of the open loop system is doubled then the gain of the system is not affected as the gain of the system is not dependent on the overall gain of the system.

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