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Automatic Control Systems

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

Magnetic flux linkage
Voltage
Charge
Electrostatic energy

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Automatic Control Systems
Temperature is analogous to

Voltage
Charge
None of these
Flux

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Automatic Control Systems
M circles are symmetrical with respect to

M = 1 straight line and real axis
M = 1 straight line and imaginary axis
M = 1 straight line
Real and imaginary axis

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Automatic Control Systems
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

False
True

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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
The sensor generally used in incremental optical encoder is

Either (a) or (b)
Photodiode
LED
LCD

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