Electrical Machines Commutator in DC generator is used for convert AC armature current in to DC collecting of current reduce losses increase efficiency convert AC armature current in to DC collecting of current reduce losses increase efficiency ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power factor of an induction motor operating at no load will have a value around 0.9 lag unity 0.2 lead 0.2 lag 0.9 lag unity 0.2 lead 0.2 lag ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A. 150 V. 280 V. 240 V. 220 V. 150 V. 280 V. 240 V. 220 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field resistance was higher than critical resistance there was a break in the armature circuit field system lost residual magnetism field winding was wrongly connected field resistance was higher than critical resistance there was a break in the armature circuit field system lost residual magnetism field winding was wrongly connected ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Reactive power generated or delivered significantly depends on load angle. frequency. excitation. both 1 and 2. load angle. frequency. excitation. both 1 and 2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which motors are preferred for refrigeration and air conditioning in smaller units? Induction motors. Reluctance motors. Stepper motors. Universal motors. Induction motors. Reluctance motors. Stepper motors. Universal motors. ANSWER DOWNLOAD EXAMIANS APP
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