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Automatic Control Systems

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

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

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Automatic Control Systems
The distance of poles from origin depends on

Damping ratio
Uqndamped natural frequency
Neither A nor B
Both A and B

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Automatic Control Systems
M circles are symmetrical with respect to

Real and imaginary axis
M = 1 straight line and real axis
M = 1 straight line and imaginary axis
M = 1 straight line

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Automatic Control Systems
Lag compensation permits a high gain at low frequencies.

False
True

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Automatic Control Systems
For any transfer function, the constant phase angle loci are

A family of straight lines
Neither (a) nor (b)
A family of circles
Either (a) or (b)

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

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

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