Question

In closed loop control system, with positive value of feedback gain the overall gain of the system will

(a) decrease

(b) increase

(c) be unaffected

(d) none of the mentioned

I had been asked this question in a national level competition.

My doubt is from Open-Loop Transfer Function in portion Automatic Control of Machine Dynamics

Answer 1

Correct answer is (a) decrease

Explanation: In closed loop control system, the output is measured and through a feedback transducer, it is sent to an error detector which detects any error in the output from the required value thus adjusting the input in a way to get the required output.