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Automatic Control Systems

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

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

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

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Automatic Control Systems
In force current analogy, displacement x is analogous to

Voltage
Electrostatic energy
Magnetic flux linkage
Charge

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

Synchro
Strain gauge
Thermistor
Load cell

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

1
less than 1
more than 1
zero

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Automatic Control Systems
DC tachogenerator can be used in

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

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