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Control Systems

Control Systems
The compensator would provide a maximum phase shift of

 20o.
 60o.
 45o.
 30o.

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Control Systems
The graph of an electrical network has N nodes and B branches. The number of links, L with respect to the choice of a tree, is given by

 B + N.
  B - N + 1.
 N - 2B - 1.
 N - B + 1.

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Control Systems
Open loop transfer function,

 band stop filter.
 band reject filter.
None of these
 all pass filter.

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

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

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Control Systems
The open loop transfer function of a unity feedback system is given by G(s) = 1/(s+2)². The closed loop transfer function will have poles at

 -2,2
 -2,-1
 -2,-2
 -2+j,-2-j

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

 zero
 infinite
 0.707
 unity

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