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Benefits of feedback:(a) Performance of system is greater.(b) Need for system much larger path gain and system instability.(c) Controlled variable accurately follows the desired value(d) Affected by parameter variationsI got this question in an interview.The origin of the question is Feedback and Non-feedback Systems topic in portion Feedback Characteristics of Control Systems of Control Systems

Answer»

Correct answer is (d) Affected by parameter variations

The best explanation: Closed LOOP system is the system with the FEEDBACK and this can be POSITIVE or negative feedback andhaving feedback have LESS dependence on parameter VARIATION.



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