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Automatic Control Systems

Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on

Either (a) or (b)
Partly on stator and partly on rotor
Rotor
Stator

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

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

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Automatic Control Systems
A lead compensator

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

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

Both (b) and (c)
Proportional
Integral
Derivative

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

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

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Automatic Control Systems
Which of the following is used to obtain output position in a position control system?

Thermistor
Load cell
Strain gauge
Synchro

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