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Control Systems

Control Systems
For a unity feedback control system open loop transfer function then acceleration error constant is

 20.
 50.
 0.
 infinity.

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Control Systems
The type of a control system is obtained from -------------- transfer function?

 open loop
 none of above.
 both open loop and closed loop
 closed loop

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Control Systems
The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the initial value?

 3/9
 3/5
 1/4
 0

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Control Systems
A system is stable for (where GM = Gain Margin and PM = Phase Margin):

 GM and PM both -ve.
 GM -ve.
 GM and PM both +ve.
 PM - ve.

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Control Systems
Sparking between the contacts can be reduced by inserting

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

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Control Systems
Electrical analogous quantity for dash-pot in force-current analogy is

 conductance.
 inductance.
 capacitance.
 resistance.

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