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Automatic Control Systems

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

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

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Automatic Control Systems
DC tachogenerator can be used in

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

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

more than 1
less than 1
1
zero

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Automatic Control Systems
In control systems the output of sensor usually, is

Analog electrical signal
Analog or digital electrical signal
Digital electrical signal
Mechanical signal

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

True
False

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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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