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Automatic Control Systems

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

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

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Automatic Control Systems
Bandwidth is proportional to speed of response.

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
A system is highly oscillatory if

Gain margin is close to 1
Gain margin is high and phase margin is 180°
Gain margin is close to 1 or phase margin is zero
Gain margin is high

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Automatic Control Systems
Which of the following is open loop system?

Wind screen wiper
Respiratory system of animal
Aqualing
System for controlling antirocket missiles

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Automatic Control Systems
Robotic manipulator arms mostly use

Electric motor actuator
Hydraulic actuator
Pneumatic actuator
None of these

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