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Automatic Control Systems

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

1
more than 1
less than 1
zero

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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
In root locus analysis the breakaway and break in points

Always occur in complex conjugate pairs
lie on the real axis
Either lie on the real axis or occur in complex conjugate pairs
None of these

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Automatic Control Systems
In force current analogy, displacement x is analogous to

Charge
Magnetic flux linkage
Electrostatic energy
Voltage

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

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

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Automatic Control Systems
A system is highly oscillatory if

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

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