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Control Systems

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

 Capacitor.
 Inductor.
 Both A and B.
 Resistor.

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Control Systems
A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is

 -180°
 180°
 -90°
 90°

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Control Systems
If the transfer function of a phase lead compensator is (s+a)/(s+b) and that of a lag compensator is (s+p)/(s+q), then which one of the following sets of conditions must be satisfied?

 a < b, p >q
 a > b, p > q
 a < b, p < q
 a > b, p < q

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Control Systems
The poles of the second order system are at -3 ± j4. The damping ratio of the system is

 3/7
 3/4
 4/5
 3/5

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Control Systems
Time taken by the response to reach and stay within a specified error is called

 Settling time.
 Raise time.
 Peak time.
 Peak overshoot.

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Control Systems
Which of the following is/are the advantages of a closed loop control system?

 nether 1 nor 2.
 The closed loop systems are accurate.
 The closed loop systems are less affected by noise.
 both 1 and 2.

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