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Automatic Control Systems
Magnetic amplifier is used for
Frequency amplification
Voltage amplification
Power amplification
Current amplification
Frequency amplification
Voltage amplification
Power amplification
Current amplification
Answer
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Related Question
Automatic Control Systems
In the field controlled motor the entire damping comes from
Field resistance
Back emf
Motor friction and load
Armature resistance
Field resistance
Back emf
Motor friction and load
Armature resistance
Answer
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Automatic Control Systems
A lead compensator
Increases the stability margin
Increases the stability margin and speeds up the transient-response.
Speeds up the transient response
None of these
Increases the stability margin
Increases the stability margin and speeds up the transient-response.
Speeds up the transient response
None of these
Answer
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Automatic Control Systems
If poles lie in first quadrant, damping ratio is
1
More than 1
less than 1
Zero
1
More than 1
less than 1
Zero
Answer
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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
Either (a) or (b)
Rotor
Stator
Partly on stator and partly on rotor
Answer
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Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.
False
True
False
True
Answer
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