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Automatic Control Systems

Automatic Control Systems
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

False
True

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Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

True
False

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Automatic Control Systems
The distance of poles from origin depends on

Damping ratio
Both A and B
Neither A nor B
Uqndamped natural frequency

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Automatic Control Systems
Lag compensation permits a high gain at low frequencies.

False
True

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Automatic Control Systems
If poles lie in first quadrant, damping ratio is

1
Zero
less than 1
More than 1

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

Surface wound with stationary rotor
Surface wound armature
Either A or B
Slotted armature

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