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Control Systems

Control Systems
Name test signals used in time response analysis?

  All of B, C, D.
  Unit step.
  Impulse.
  Unit ramp.

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Control Systems
Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?

 S is on root locus
 S is not on root locus
None of these
 either 1 or 2

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Control Systems
Angle condition for complimentary root locus or inverse root locus is

 ± (2q + 1) 180°
 ± (2q + 1) 360°
 ± (2q) 360°
 ± (2q) 180°

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Control Systems
Which of the following is/are the disadvantages of an open loop control system?

 Inaccurate.
 Unreliable.
None of these
 both 1 and 2.

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

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

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Control Systems
When the input to a system was with drawn at t = 0, its output was found to decrease exponentially from 1000 units to 500 units in 1.386 sec. The time constant of the system is

 0.693.
 0.500.
 1.386.
 2.000.

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