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Control Systems

Control Systems
The unit step response of the system is 1 - e-t(1+t). Which is the system?

 critically stable
 stable
 oscillatory
 unstable

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

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

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Control Systems
Sparking between the contacts can be reduced by inserting

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

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Control Systems
Which of the following combinations is/are correct electrical analogous elements in force-current analogy?

 Velocity (v) ----------------- Voltage (V)
 Spring element (K) --------- Inverse inductance (1/L)
All of these
 Force (f) --------------------- Current (i)

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Control Systems
In which of the following controller band width is increased?

 proportional plus derivative controller
 proportional plus integral controller
 both 1 and 2
 nether 1 nor 2

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Control Systems
The transfer function of a system is G(s) = 100/((s+1)(s+100)). For unit step input to the system the approximate settling time for 2% criterion is

 10 sec
 100 sec
 4 sec
 400 sec

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