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Automatic Control Systems

Automatic Control Systems
DC tachogenerator can be used in

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

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

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

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

Surface wound armature
Either A or B
Slotted armature
Surface wound with stationary rotor

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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
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
Temperature is analogous to

Voltage
None of these
Charge
Flux

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