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Control Systems

Control Systems
The impulse response of a linear system is e-t, (t > 0). The corresponding transfer function is

 s/(s+1)
 1/s(s+1)
 1/(s+1)
 1/s

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Control Systems
If two blocks having gains A and B respectively are in series connection, find the resultant gain using block diagram reduction technique?

 A*B
 A+B
 A-B
 A/B

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

 zero
 0.707
 infinite
 unity

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Control Systems
Angle condition for complimentary root locus or inverse root locus is

 ± (2q) 360°
 ± (2q + 1) 360°
 ± (2q) 180°
 ± (2q + 1) 180°

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

 Resistor.
 Both A and B.
 Inductor.
 Capacitor.

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Control Systems
Which of the following is the correct expression for the transfer function of an electrical RC phase lag compensating network?

 1/(1+RCS)
 RC/(1+RCS)
 RCS/(1+RCS)
 C/(1+RCS)

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