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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
Nichols chart consists of

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

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Automatic Control Systems
For any transfer function, the constant phase angle loci are

Neither (a) nor (b)
A family of straight lines
A family of circles
Either (a) or (b)

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Automatic Control Systems
Bandwidth is proportional to speed of response.

True
False

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Automatic Control Systems
Which of the following is open loop system?

Respiratory system of animal
Wind screen wiper
Aqualing
System for controlling antirocket missiles

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Automatic Control Systems
In a simple on-off controller with differential gap, the magnitude of differential gap determines

Both (a) and (b)
The level of accuracy
Neither (a) nor (b)
The life of controller

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