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Automatic Control Systems

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

less than 1
more than 1
1
zero

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

True
False

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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
Which dc servomotor requires strongest permanent magnet?

Surface wound armature
Slotted armature
Surface wound with stationary rotor
Either A or B

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

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

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

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

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