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Control Systems

Control Systems
The Laplace transformation of f(t) is F(S) given the final value of f(t) is

 One.
 Zero.
 Infinite.
 None of them.

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Control Systems
A system of constant voltage and constant frequency is called _________________ system.

None of these
  feedback.
  zero.
  infinite.

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

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

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Control Systems
Which of the following statements is/are true?

 Centroid may not be a part of root locus
 nether 1 nor 2
 Centroid may be a part of root locus
 both 1 and 2

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Control Systems
For type 1 system with parabolic input, the steady state error is

 zero.
 infinite.
 indeterminate.
 finite constant.

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

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