If the excitation of a 3-phase alternator operating on infinite bus bars is changed, which one of the following shall alter?
A. Active power of machine.
B. Reactive power of machine.
C. Terminal voltage of machine.
D. Frequency of machine. [U.P.S.C. I.E.S. 2008]
Answer:B
If the excitation of a 3-phase alternator operating on infinite bus bars is changed, which one of the following shall alter?
A. Active power of machine. B. Reactive power of machine. C. Terminal voltage of machine. D. Frequency of machine. [U.P.S.C. I.E.S. 2008]