A unity feedback control system has an open loop transfer function ___

A unity feedback control system has an open loop transfer function G(s) = k/(s(s² + 7s + 12).

The gain k for which s = -1 + j1 will lie on the root locus of the system is

A. 4
B. 6.5
C. 5
D. 10

Show Answer

Answer: D

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