The active power delivered by an alternator will _______ when the prime mover input is increased for the alternator connected to infinite bus bar.

Concept & ReasoningAn infinite bus is so large that one generator cannot appreciably change its voltage or frequency. Once synchronized, mechanical input from the prime mover mainly controls real power, while field excitation mainly controls reactive power/power factor. Increasing turbine or engine input accelerates the rotor momentarily, increasing power angle δ until the electromagnetic power rises to a new balance. Thus active power output increases.How to Solve It in the ExamPrime mover controls MW; excitation controls MVAr.Important Exam PointKeep infinite-bus voltage and frequency fixed in your reasoning.Related Revision PathThis question sits in the revision path Electrical Machines → Synchronous Machines…