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Automatic Control Systems

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

more than 1
1
less than 1
zero

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Automatic Control Systems
Which control action can never be used alone?

Derivative
Integral
Proportional
Both (b) and (c)

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Automatic Control Systems
Nichols chart consists of

Magnitude and phase angle loci in log-magnitude versus phase diagram
Constant magnitude loci
None of these
Constant phase angle loci

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

Root locus
Bode plot
Nyquist plot
Nichols chart

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Automatic Control Systems
The poles with greater displacement from the real axis correspond to

Unbounded output
Lower frequencies of oscillations
Stable response
Higher frequencies of oscillations

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