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Control Systems

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

 Capacitor.
 Inductor.
 Resistor.
 Both A and B.

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Control Systems
A transfer function is given as The steady state sinusoidal response will become zero at a frequency response of

 9 rad/s
 3 rad/s
 4 rad/s
 2 rad/s

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Control Systems
Which of the following are the disadvantages of a closed loop control system?

 Oscillatory response.
 Reduces the overall gain.
All of these
 Complex and costly.

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Control Systems
Lowest critical frequency is due to zero and it may be present at the origin or nearer to the origin, then the type of network is

 RL Circuit.
 LC circuit.
 RC circuit.
 RLC circuit.

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Control Systems
For a second order under damped system subjected to unit step input the time response has first peak value to be 4 times the second over shoot. Determine the damping ratio ξ ?

 0.87
 0.087
 0.707
 0.07

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Control Systems
Find the Laplace transform for sinωt?

 ω/(s²+ω²)
 1/s
 s/(s²+ω²)
 1/s²

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