The closed loop transfer function of a control system is: $$\frac{K}{{s\left( {s + 1} \right)\left( {s + 5} \right) + K}}$$
What is the frequency of the sustained oscillations for marginally stable condition?
A. $$\sqrt 5 $$ rad/s
B. $$\sqrt 6 $$ rad/s
C. 5 rad/s
D. 6 rad/s
Answer: Option A
This Question Belongs to Electronics And Communications Engineering >> Control Systems
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