The per-phase synchronous reactance of a three-phase, wye-connected, 2.5-MVA, 6.6-kV, 60-Hz turboalternator is 10 2. Neglect the armature resistance and saturation. Calculate the voltage regulation when the generator is operating at full load with (a) 0.8 power factor lagging, and (b) 0.8 power factor leading.

If the prime mover torque suddenly falls by a considerable amount, the damperwinding of the alternator witnesses the flow of a massive current through it, which further opposes the prime mover torque.True or False

In a synchronous machine, if magnetic field of the rotor lags the stator field by a mechanical angle "a": O A. It is only possible in an induction machine O B. It is a generator O C. None of the other choices are correct O D. It is a motor O E. It can't happen in synchronous machines; both fields are in synch