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The closed loop transfer function of a control system is frac...

This question belongs to Electronics And Communications Engineering Control Systems
Control Systems
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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?

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Correct Answer: Option A
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