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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
what is the Laplace transform of a function δ(t-2)?

 2s
 e-2s
 0
 2

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

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

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Control Systems
A linear time invariant system, initially at rest when subjected to a unit step input gave response c(t) = te-t (t ≥ 0). The transfer function of the system is

 (s+1)2/s
 s/(s+1)
 1/s(s+1)2
 s/(s+1)2

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Control Systems
The transfer function of a system is G(s) = 100/((s+1)(s+100)). For unit step input to the system the approximate settling time for 2% criterion is

 100 sec
 4 sec
 400 sec
 10 sec

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Control Systems
Which of the following is/are the example of actuator?

 All
 Electric motor
 Hydraulic motor
 Pneumatic motor

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