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Control Systems

Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 1
 2
 3
 4

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Control Systems
Accurate and reliable output is possible with which of the following system?

 Both 1 and 2
None of these
 Closed loop control system
 Open loop control system

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

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

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Control Systems
The impulse response of an initally relaxed linear system is e-2tu(t). To produce a response of te-2tu(t), the input must be equal to

 e-tu(t).
 2e-tu(t).
 (0.5)e-2tu(t).
 e-2tu(t).

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Control Systems
The transfer function of phase lead compensator is given by , where, T > 0, α < 0. What is the maximum phase shift provided by this compensator?

 cos-1((1 - α)/(1 + α)
 tan-1((1 - α)/(2√α)
 both 1 and 3
 sin-1((1 - α)/(1 + α)

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Control Systems
The transfer function for tachometer E(S)/θ(S) is

 KS
 K/S
 KS2
 K

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