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DC Generators - Interview Questions and Answers

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41. The e.m.f. generated by a shunt wound D.C. generator isE. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be
A. E/2
B. 2E
C. slightly less than E
D. E
Explanation:
42. In D.C. generators, lap winding is used for
A. high voltage, high current
B. low voltage, high current
C. high voltage, low current
D. low voltage, low current
Explanation:
43. In D.C. generators, the brushes on commutator remain in contact with conductors which
A. lie under south pole
B. lie under north pole
C. lie under interpolar region
D. are farthest from the poles
Explanation:
44. The function of pole shoes in the case of D.C. machine is
A. to reduce the reluctance of the magnetic path
B. to spread out the flux to achieve uniform flux density
C. to support the field coil
D. to discharge all the above functions
Explanation:
45. Equilizer rings are required in case armature is
A. wave wound
B. lap wound
C. delta wound
D. duplex wound
Explanation:
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