DC Generators The armature of a dc machine having 10 poles is rotating at a speed of 10 revolution per second. The number of hysteresis loops formed per second is ______ 50 150 10 100 50 150 10 100 ANSWER DOWNLOAD EXAMIANS APP
DC Generators With a D.C. generator which of the following regulation is preferred? Infinite regulation 50% regulation 100% regulation 1% regulation Infinite regulation 50% regulation 100% regulation 1% regulation ANSWER DOWNLOAD EXAMIANS APP
DC Generators If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be Zero The same as rated voltage Small High Zero The same as rated voltage Small High ANSWER DOWNLOAD EXAMIANS APP
DC Generators The overall efficiency of a dc generator is maximum when its variable loss is equal to Mechanical loss Constant loss Stray loss Iron loss Mechanical loss Constant loss Stray loss Iron loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators The rapid wear of brushes takes place due to Abrasion from dust All of these Rough commutator bars Excessive spring pressure Abrasion from dust All of these Rough commutator bars Excessive spring pressure ANSWER DOWNLOAD EXAMIANS APP
DC Generators Due to armature reaction, the main pole flux of a dc generator is None of the listed here Distorted only Weakend only Weakened as well as distorted None of the listed here Distorted only Weakend only Weakened as well as distorted ANSWER DOWNLOAD EXAMIANS APP
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