Question

The disadvantages of the linear system are:

(a) The constraints on the linear operation over wide range demands unnecessarily high quality.

(b) The restriction to the linear theory may inhibit the designer’s curiosity to deliberately introduce the non-linear components.

(c) Practically systems are non-linear

(d) All of the mentioned

This question was addressed to me at a job interview.

Asked question is from Necessary Conditions for Stability and Non-Linear Systems topic in chapter Stability and Algebraic Criteria of Control Systems

Answer 1

Correct option is (d) All of the mentioned

To explain: Linear system impose certain restrictions as the components cost is very high and it will cause restriction to operate the otherwise linear components in non-linear region with a view to improve system response.