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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'?

 3
 2
 1
 0

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Control Systems
Which of the following is/are represents the lead compensator?

 both 2 and 3
 (s+2)/(s+1)
 (s+5)/(s+6)
 (s+2)/(s+5)

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Control Systems
The type number of the control system with G(s) = k(s+2)/(s(s²+2s+3) is

 2
 0
 3
 1

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Control Systems
Which of the following transfer functions represent under damped second order systems?

All of these
 4/(s² + 2s + 4)
 2/(s² + 2s + 2)
 1/(s² + s + 1)

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Control Systems
The impulse response of the system described by the differential equation will be

 e-3t u(t).
 e6t.
 1/3.
 (1/3) × (1-e-3t).

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

 0.
 20.
 40.
 infinity.

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