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Control Systems

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

 13/4
 4/13
 4/9
 9/4

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

 Type of the system is obtained from open loop transfer function
All of these
 The steady state analysis depends on type of the system
 Transient state analysis depends on order of the system

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Control Systems
A second order system has peak over shoot = 50% and period of oscillations 0.2 seconds. Find the resonant frequency?

 30.63 rad/s
 32.16 rad/s
 31.41 rad/s
 29.74 ra/s

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Control Systems
Let P = Number of open loop poles and Z = Number of open loop zeros and P > Z, find the number of branches terminating at ∞?

 Any of the above
 Z
 P - Z
 P

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Control Systems
The output of the system has an effect upon the input quantity, then the system is a

None of these
 open loop control system.
 closed loop control system.
 either 1 or 2.

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Control Systems
Sparking between the contacts can be reduced by inserting

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

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