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Automatic Control Systems

Automatic Control Systems
Lag compensation permits a high gain at low frequencies.

False
True

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

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

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

False
True

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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 control systems the output of sensor usually, is

Digital electrical signal
Mechanical signal
Analog electrical signal
Analog or digital electrical signal

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Automatic Control Systems
For any transfer function, the constant phase angle loci are

Either (a) or (b)
A family of circles
Neither (a) nor (b)
A family of straight lines

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