Electrical Machines A 8-pole, DC generator has a simplex wave-wound armature containing 32 coils of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm. The induced armature voltage is 192 V 768 V 384 V 96 V 192 V 768 V 384 V 96 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ratio of starting torque to full load torque is minimum in Differential compound motor. Series motor. Shunt motor. Cumulative compound motor. Differential compound motor. Series motor. Shunt motor. Cumulative compound motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For high current and low current rating which winding is employed to DC machine? None of above Lap winding Wave winding Both lap and wave winding None of above Lap winding Wave winding Both lap and wave winding ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when driven without any excitation, showed an open circuit voltage of 12 V. When the field winding was excited, the voltage dropped to zero. It happened because field resistance was higher than critical resistance there was a break in the armature circuit there was no residual magnetism in the field circuit field winding was wrongly connected field resistance was higher than critical resistance there was a break in the armature circuit there was no residual magnetism in the field circuit field winding was wrongly connected ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 2/√5 1/√5 1/√2 1/3 2/√5 1/√5 1/√2 1/3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The application that need frequent starting and stopping is blowers. jaw crushers. lifts and hoists. paper mills. blowers. jaw crushers. lifts and hoists. paper mills. ANSWER DOWNLOAD EXAMIANS APP
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