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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
A lead compensator

Increases the stability margin and speeds up the transient-response.
Speeds up the transient response
None of these
Increases the stability margin

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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 the poles lie in second quadrant, damping ratio is

1
less than 1
zero
more than 1

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Automatic Control Systems
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

The gain is decreased below lower critical value
The gain is increased beyond upper critical value
Both A and B
None of these

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Automatic Control Systems
Which of the following is used to obtain output position in a position control system?

Synchro
Thermistor
Load cell
Strain gauge

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