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Automatic Control Systems

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

Either (a) or (b)
LED
Photodiode
LCD

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Automatic Control Systems
The effect of adding poles and zeros can be determined quickly by

Root locus
Nichols chart
Nyquist plot
Bode plot

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Automatic Control Systems
Nichols chart consists of

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

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Automatic Control Systems
Temperature is analogous to

Voltage
Flux
Charge
None of these

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Automatic Control Systems
For type 1 system the velocity lag error is

Inversely proportional to bandwidth of system
Directly proportional to gain constant
Inversely proportional to gain constant
Independent of gain constant

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Automatic Control Systems
In the field controlled motor the entire damping comes from

Field resistance
Armature resistance
Back emf
Motor friction and load

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