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Automatic Control Systems

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

LED
Photodiode
LCD
Either (a) or (b)

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

Load cell
Synchro
Thermistor
Strain gauge

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Automatic Control Systems
Nichols chart consists of

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

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Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on

Either (a) or (b)
Rotor
Stator
Partly on stator and partly on rotor

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Automatic Control Systems
Bandwidth is proportional to speed of response.

True
False

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

Zero
More than 1
1
less than 1

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