Electronics and Communication Engineering - Exam Questions Papers - Discussion

Discussion Forum : Exam Questions Papers - Exam Paper 6 (Q.No. 48)
48.
The given characteristic polynomial s4 + s3 + 2s2 + 2s + 3 = 0 has
zero root in RHS of s-plane
one root in RHS of s-plane
two roots in RHS of s-plane
three roots in RHS of s-plane
Answer: Option
Explanation:

By Routh's Array

When ε -> 0, two sign changes in the first column, so there are two roots in RHS plane.

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