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Automatic Control Systems

Automatic Control Systems
Nichol’s chart is symmetric about – 180° axis.

False
True

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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
The life of controller
Neither (a) nor (b)

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

Armature resistance
Motor friction and load
Back emf
Field resistance

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Automatic Control Systems
Magnetic amplifier is used for

Power amplification
Current amplification
Frequency amplification
Voltage amplification

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Automatic Control Systems
In Bode plots the frequency at which two asymptotes meet is called corner frequency.

False
True

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Automatic Control Systems
The poles with greater displacement from the real axis correspond to

Stable response
Unbounded output
Lower frequencies of oscillations
Higher frequencies of oscillations

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