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Control Systems

Control Systems
A open loop transfer function is given as G(s) = (s+2)/(s+1)(s-1). Find the number of encirclements about '-1+j0'?

 1
 2
 0
 3

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

 20.
 40.
 infinity.
 0.

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Control Systems
Lead network is used to

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

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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

 0.707
 zero
 infinite
 unity

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

 infinity.
 0.
 50.
 10.

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

 2
 6
 8
 4

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