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Automatic Control Systems

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

zero
less than 1
1
more than 1

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Automatic Control Systems
The poles with greater displacement from the real axis correspond to

Unbounded output
Higher frequencies of oscillations
Lower frequencies of oscillations
Stable response

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Automatic Control Systems
Nyquist stability criterion uses open loop frequency response characteristics.

False
True

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Automatic Control Systems
Which control action can never be used alone?

Both (b) and (c)
Derivative
Proportional
Integral

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Automatic Control Systems
Magnetic amplifier is used for

Power amplification
Frequency amplification
Current amplification
Voltage amplification

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

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

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