1. For turbo-alternators, the usual value of pole number is
2. Under no-load condition power drawn by the prime mover of an alternator goes to
3. As load p.f. of an alternator becomes more leading, the value of generated voltage required to give rated terminal voltage
4. In an alternator running with a balanced zero p.f. lagging load, phase difference between the resultant armature (or stator) flux and main field flux is always.
5. At lagging loads, armature reaction in an alternator is
6. Synchronous impedance method of finding voltage regulation of an alternator is called pessimistic method because
7. If chording angle for fundamental flux wave is a, its value for 5th harmonic is
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