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Automatic Control Systems

Automatic Control Systems
The sensor generally used in incremental optical encoder is

Either (a) or (b)
Photodiode
LED
LCD

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

More than 1
less than 1
1
Zero

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Automatic Control Systems
Nichol’s chart is symmetric about – 180° axis.

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

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

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Automatic Control Systems
The effect of adding poles and zeros can be determined quickly by

Nichols chart
Bode plot
Nyquist plot
Root locus

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