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Control Systems

Control Systems
First Foster form of a LC network represents which element in the beginning?

 Both A and B.
 Inductor.
 Resistor.
 Capacitor.

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

 e-5s.
 1/(s-5).
 e5s.
 1/(s+5).

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

 1
 4
 3
 2

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Control Systems
Sparking between the contacts can be reduced by inserting

  a capacitor in parallel with the contacts.
 a resistor in the line.
 a capacitor in series with the contacts.
 a reactor in the line.

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Control Systems
The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is

 3.
 4.
 2.
 0.

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Control Systems
Which one of the following is the steady state error for a step input applied to a unity feedback system with the open loop transfer function G(s) = 10/(s²+14s+50)?

 0.83
 infinite
 0
 1

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