Question

Consider the following statement:

(a) A system is said to be stable if its output is bounded for any input

(b) A system is said to be stable if all the roots of the characteristic equation lie on the left half of the s plane.

(c) A system is said to be stable if all the roots of the characteristic equation have negative real parts.

(d) A second order system is always stable for finite values of open loop gain

The question was asked in an online interview.

Query is from Routh-Hurwitz Stability Criterion in division Stability and Algebraic Criteria of Control Systems

Answer 1

Correct option is (a) A system is said to be stable if its output is bounded for any input

Best explanation: A system is stable if its output is bounded for bounded input.