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Control Systems

Control Systems
The compensator would provide a maximum phase shift of

 20o.
 60o.
 45o.
 30o.

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Control Systems
Find the stability for the following transfer function G(s) = 50/s(s+5) ?

 Critically stable
 Stable
 Marginally stable
 Unstable

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Control Systems
Which of the following is/are the advantages of a closed loop control system?

 The closed loop systems are less affected by noise.
 nether 1 nor 2.
 both 1 and 2.
 The closed loop systems are accurate.

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Control Systems
For a unity feedback control system open loop transfer function then acceleration error constant is

 0.
 50.
 20.
 infinity.

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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?

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

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Control Systems
What is the open loop DC gain of a unity feedback control system having closed loop transfer function as

 13/4
 9/4
 4/13
 4/9

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