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Control Systems

Control Systems
What is the type of closed loop system for the plant transfer function G(s) = k/s²(1+Ts) and with unity feedback?

 2
 0
 3
 1

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Control Systems
Which of the following statements is/are true?

 both 1 and 2
 Centroid may not be a part of root locus
 Centroid may be a part of root locus
 nether 1 nor 2

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Control Systems
The transfer function of a plant is T(s) = 5/(s+5)(s² + 5 + 1). The second order approximation of T(s) using dominant pole concept is

 1/(s² + 5 + 1)
 1/(s+1)(s+5)
 5/(s² + 5 + 1)
 5/(s+1)(s+5)

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Control Systems
In signal flow graph input node is node having only------------

None of these
 incoming branches.
 outgoing branches.
 both 1 and 2.

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Control Systems
The Laplace transform of a transportation lag of 5 seconds is

 1/(s-5).
 e5s.
 1/(s+5).
 e-5s.

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Control Systems
When compared to a 1st order LPF, a 2nd order LPF has

 faster drop in filter response.
 higher voltage gain.
 higher cut off frequency.
 lower voltage gain.

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