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Automatic Control Systems

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

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

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Automatic Control Systems
Nichols chart consists of

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

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

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

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

Photodiode
LED
LCD
Either (a) or (b)

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Automatic Control Systems
In the field controlled motor the entire damping comes from

Motor friction and load
Field resistance
Armature resistance
Back emf

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Automatic Control Systems
DC tachogenerator can be used in

Speed control system
Neither A nor B
Both A and B
Position control system

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MORE MCQ ON Automatic Control Systems

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