engineering recuitment BHEL Engineer Trainee Mock Test 2025 Control Systems Stability Analysis Routh-Hurwitz Stability Criteria
Which of the following is the correct comment on stability based on unknown k for the feedback system with characteristic s4 + 2ks3 + s2 + 5s + 5 = 0?
1
Unstable for all the values of k
2
Stable for zero value of k
3
Stable for positive value of k
4
Stable for all the values of k