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Control Systems

Control Systems
The characteristic equation for closed loop system is given as . The value of k for which the system becomes just stable is

 6
 4
 8
 2

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Control Systems
For type 1 system with parabolic input, the steady state error is

 infinite.
 finite constant.
 zero.
 indeterminate.

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Control Systems
Lead network is used to

 improve steady state response.
 improve transient response.
 both A and C.
 increase bandwidth.

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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
The transfer function of a phase lead compensator is given by: G(s) = (1 + 3Ts)/(1 + Ts) where T>0. What is the maximum phase shift provided by such a compensator?

 30°
 60°
 90°
 45°

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Control Systems
Force balancing equation of a dash-pot element is (where, x = displacement)

 B dx/dt
 B d2x/dt2
None of these
 B *x

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