1.

Consider the following open-loop transfer function:\(G = \frac{{K\left( {s + 2} \right)}}{{\left( {s + 1} \right)\left( {s + 4} \right)}}\)The characteristic equation of the unity negative feedback will be

A. (s + 1)(s + 4) + K (s + 2) = 0
B. (s + 2)(s + 1) + K (s + 4) = 0
C. (s + 1)(s - 2) + K (s + 4) = 0
D. (s + 2)(s + 4) + K (s + 1) = 0
Answer» B. (s + 2)(s + 1) + K (s + 4) = 0


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