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Automatic Control Systems

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

less than 1
zero
more than 1
1

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

Voltage
Magnetic flux linkage
Electrostatic energy
Charge

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Automatic Control Systems
A lead compensator

None of these
Speeds up the transient response
Increases the stability margin and speeds up the transient-response.
Increases the stability margin

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Automatic Control Systems
Nichols chart consists of

Magnitude and phase angle loci in log-magnitude versus phase diagram
None of these
Constant phase angle loci
Constant magnitude loci

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Automatic Control Systems
The relative stability of a system is given by

Gain margin alone
Phase margin alone
Both phase and gain margins
Either (a) or (b)

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Automatic Control Systems
The sensor generally used in incremental optical encoder is

LED
Photodiode
Either (a) or (b)
LCD

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