Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to magnetic inertia. high field resistance. residual flux. high speed. magnetic inertia. high field resistance. residual flux. high speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A generator may loose residual magnetism due to heating. vibrations. any of these. over excitation. heating. vibrations. any of these. over excitation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the residual magnetism is of the order of 10 %. 15 %. 20 %. 2.5 %. 10 %. 15 %. 20 %. 2.5 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In large sized DC machines the compensating windings are provided to neutralize voltage induced in coil due to fluctuation of l None of these compensate for the decrease in speed due to increase of load. reduce eddy current losses by providing local short circuits. neutralize voltage induced in coil due to fluctuation of l None of these compensate for the decrease in speed due to increase of load. reduce eddy current losses by providing local short circuits. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines, the interpoles are provided to counteract the reactance voltage and the cross-magnetizi both (B) and (C). to make commutation spark less. to counteract demagnetizing effect of armature mmf in commutating zone. to counteract the reactance voltage and the cross-magnetizi both (B) and (C). to make commutation spark less. to counteract demagnetizing effect of armature mmf in commutating zone. ANSWER DOWNLOAD EXAMIANS APP
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