Question

Assertion (A): Practical systems must be closed loop system.

Reason (R): This is due to the fact that closed loop systems are least affected by parameter variations, stable, higher bandwidth, linear and more speed of response.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.

(c) A is true but R is false.

(d) A is false but R is true.

This question was addressed to me during an internship interview.

I need to ask this question from Linearizing Effect and Regenerative Feedback in chapter Feedback Characteristics of Control Systems of Control Systems

Answer 1

The correct option is (a) Both A and R are true and R is the correct explanation of A.

The explanation: Practically systems used must be linear to avoid error, ease of calibration and also to get accurate results but the systems used are non-linear to avoid the error due to the linearity they are approximated.