Q. In propotional mode feedback control, increased loop gain:

A
Improves the steady state accuracy
B
Increases disturbance signal rejection
C
Improves relative stability
D
All of the above
Solution:

When you increase gain the steady state error decreases, the system acts more quickly towards the target. Controllers improve steady state accuracy by decreasing the steady state errors. As the steady state accuracy improves, the stability also improves. They also help in reducing the noise signals produced in the system.

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