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Automatic Control Systems

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

less than 1
1
more than 1
zero

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Automatic Control Systems
Which of the following is open loop system?

Respiratory system of animal
Wind screen wiper
Aqualing
System for controlling antirocket missiles

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

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

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Automatic Control Systems
Which control action can never be used alone?

Proportional
Derivative
Integral
Both (b) and (c)

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Automatic Control Systems
Magnetic amplifier is used for

Power amplification
Frequency amplification
Current amplification
Voltage amplification

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Automatic Control Systems
In root locus analysis the breakaway and break in points

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

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