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Control Systems

Control Systems
Which of the following is/are represents the lag compensator?

 (s+2)/(s+1)
 (s+2)/(s+5)
 (s+5)/(s+6)
 both 1 and 2

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Control Systems
The transfer function of a system given by The system is

 a critically damped.
 unstable.
 an under damped.
 an over damped.

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Control Systems
Lead network is used to

 improve steady state response.
 both A and C.
 increase bandwidth.
 improve transient response.

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its closed loop transfer function is

 (2s+1)/(s+1)²
 (2s+2)/(s+1)²
 (2s+1)/s²
 (2s+2)/s²

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Control Systems
The initial slope of Bode plot for a transfer function having no poles at the origin is

 -20dB/decade.
 0 dB/decade
 -10dB/decade.
 +10dB/decade.

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Control Systems
The input-output relationship of a linear time invariant continuous time system is given by r(t) = d²c(t)/dt² + 3 dc(t)/dt + 2 c(t) Where r(t) and c(t) are input and output respectively. What is the transfer function of the system equal to?

 2/(s² + 3s + 2)
 1/(s² + s + 2)
 2/(s² + s + 2)
 1/(s² + 3s + 2)

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