Automatic Control Systems
A system is highly oscillatory if

Gain margin is close to 1
Gain margin is close to 1 or phase margin is zero
Gain margin is high
Gain margin is high and phase margin is 180°

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Automatic Control Systems
In a two phasor servomotor, the direction of rotation of the rotating field depends on

Phase relation of voltages applied to the two stator windings
Magnitudes of voltages applied to the two stator windings
Both magnitude and phase relationship of voltages applied to the two stator windings
None of these

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