If the excitation of a 3-phase alternator operating on infinite bus bars is changed, which one of the following will get affected?
(a) Active real power of machine
(b) Reactive power of machine
(c) Terminal voltage of machine
(d) Frequency of machine
The question was posed to me during an interview.
The above asked question is from Measurement of Xd and Xq in portion Synchronous Machines of Electrical Machines