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Control Systems

Control Systems
Slope of asymptote in Bode plot of 2nd order system is _____________________ per octave.

 3 dB
 12 dB
 6 dB
 18 dB

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Control Systems
Open loop transfer function,

 band stop filter.
 band reject filter.
 all pass filter.
None of these

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Control Systems
Negative feedback in a closed loop control system

 reduces gain.
 improves disturbance rejection.
 reduces sensitivity to parameter variation.
All of these

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Control Systems
Which of the following is/are represents the lead compensator?

 (s+5)/(s+6)
 (s+2)/(s+1)
 (s+2)/(s+5)
 both 2 and 3

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Control Systems
For the polynomial , find the number of roots which lie on the right half of s-plane?

 4
 0
 1
 2

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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°
 -90°
 -180°
 90°

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