A unity feedback system with open loop transfer function \({\rm{G}}\left( {\rm{s}} \right) = \frac{9}{{{\rm{s}}\left( {{\rm{s}} + {\rm{P}}} \right)}}\) is critically damped. The value of the parameter ‘P’ is

A unity feedback system with open loop transfer function \({\rm{G}}\l

1.	A unity feedback system with open loop transfer function \({\rm{G}}\left( {\rm{s}} \right) = \frac{9}{{{\rm{s}}\left( {{\rm{s}} + {\rm{P}}} \right)}}\) is critically damped. The value of the parameter ‘P’ is
A.	6
B.	3
C.	2
D.	9
Answer» B. 3

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A unity feedback system with open loop transfer function \({\rm{G}}\left( {\rm{s}} \right) = \frac{9}{{{\rm{s}}\left( {{\rm{s}} + {\rm{P}}} \right)}}\) is critically damped. The value of the parameter ‘P’ is

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