Stability Theory – 42

42. The open-loop transfer function of a control system is given by G(s) = (K(s+8))/(S( s+4)(s+a)) The smallest possible value of a for which the system is stable in the closed-loop for all positive value of K is :

(a) 0
(b) 4
(c) 8
(d) 12

Answer : (b)

Explanation : No answer description available for this question. Let us discuss.

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