A synchronous generator is feeding power to infinite bus bars at unity power factor. Its excitation is now increased. It will feed
- A. The same power but at a leading power factor
- B. The same power but at a lagging power factor
- C. More power at unity power factor
- D. Less power at unity power factor
Answer: B. The same power but at a lagging power factor
Explanation: Increasing the excitation of an alternator connected to infinite bus increases its induced EMF E above bus voltage V, delivering reactive power to the bus and causing it to operate at a lagging power factor (overexcited).