DC Motors Armature reaction in dc motor is increased When the armature current decreases When the field current increases By interpoles When the armature current increases When the armature current decreases When the field current increases By interpoles When the armature current increases ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Copper losses Windage losses Hysteresis losses Eddy current losses Copper losses Windage losses Hysteresis losses Eddy current losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors During rheostat braking of dc series motor None of the listed here Motor is reversed in direction Motor is run as a generator Motor is run at reduced speed None of the listed here Motor is reversed in direction Motor is run as a generator Motor is run at reduced speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To support the field coils To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity To support the field coils To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ Opposes the applied voltage Aids the applied voltage None of the listed here Aids the armature current Opposes the applied voltage Aids the applied voltage None of the listed here Aids the armature current ANSWER DOWNLOAD EXAMIANS APP
DC Motors When the armature of a D.C. motor rotates, e.m.f. induced is Back e.m.f. Mutually induced e.m.f. None of these Self-induced e.m.f. Back e.m.f. Mutually induced e.m.f. None of these Self-induced e.m.f. ANSWER DOWNLOAD EXAMIANS APP
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