What does swing equation describe?

Q.  What does the swing equation describe?
- Published on 19 Oct 15

a. The relative motion of rotor with the field windings of the machine
b. The relative motion of the rotor with respect to stator field as a function of time.
c. The relative motion of stator field with the rated frequency of the machine
d. The performance curve of the machine

ANSWER: The relative motion of the rotor with respect to stator field as a function of time.

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