1. For turbo-alternators, the usual value of pole number is
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2. Under no-load condition power drawn by the prime mover of an alternator goes to
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3. As load p.f. of an alternator becomes more leading, the value of generated voltage required to give rated terminal voltage
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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.
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5. At lagging loads, armature reaction in an alternator is
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6. Synchronous impedance method of finding voltage regulation of an alternator is called pessimistic method because
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7. If chording angle for fundamental flux wave is a, its value for 5th harmonic is
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