driving force of both the alternators is changed, this will result in change _________ A. frequency C. generated emf B. back emf D. all of the above 3. If the field of a synchronous motor is under-excited, the power factor will be _________ A. lagging C. unity B. leading D. more than unity 4. The power factor of an alternator is determined by _________ A. speed C. excitation B. load D. prime mover 5. For proper parallel operation, three-phase alternators must have the same _________ A. speed C. kVA rating B. voltage rating D. excitation
(need help for this correct letter/answer thank you)
Choose the Correct Letter
1. An electric motor in which both the rotor and stator fields rotate with the same
speed is called _________ motor.
A. d.c. C. synchronous
B. Schrage D. universal
2. Two-alternators are running in parallel. If the driving force of both the alternators
is changed, this will result in change _________
A. frequency C. generated emf
B. back emf D. all of the above
3. If the field of a synchronous motor is under-excited, the power factor will be _________
A. lagging C. unity
B. leading D. more than unity
4. The power factor of an alternator is determined by _________
A. speed C. excitation
B. load D. prime mover
5. For proper parallel operation, three-phase alternators must have the same _________
A. speed C. kVA rating
B. voltage rating D. excitation
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