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Control Systems

Control Systems
In a control system, an integrator is represented by

 1 / s2.
  s.
  s2.
  1 / s.

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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.
 2.000.
 1.386.
 0.500.

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Control Systems
Sparking between the contacts can be reduced by inserting

 a reactor in the line.
  a capacitor in parallel with the contacts.
 a capacitor in series with the contacts.
 a resistor in the line.

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Control Systems
First Foster form of a LC network represents which element in the beginning?

 Resistor.
 Inductor.
 Both A and B.
 Capacitor.

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Control Systems
Transient state analysis depends on which of the following?

 both 1 and 2
 order of system
 type of system
 nether 1 nor 2

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Control Systems
The open loop transfer function of non unity negative feedback system is , then the number of root locus branches equal to

 3.
 1.
 2.
 0.

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