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Automatic Control Systems

Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

True
False

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

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

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Automatic Control Systems
A lead compensator

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

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Automatic Control Systems
In Bode plots the frequency at which two asymptotes meet is called corner frequency.

True
False

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

Back emf
Armature resistance
Field resistance
Motor friction and load

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

Surface wound armature
Surface wound with stationary rotor
Slotted armature
Either A or B

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