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Automatic Control Systems

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

LED
LCD
Either (a) or (b)
Photodiode

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Automatic Control Systems
Robotic manipulator arms mostly use

Pneumatic actuator
Electric motor actuator
Hydraulic actuator
None of these

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Automatic Control Systems
The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions.

False
True

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Automatic Control Systems
Nichols chart consists of

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

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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

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

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