Electrical Machines Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator? Dummy coils. Equalizer rings. Eye bolt. Commutator. Dummy coils. Equalizer rings. Eye bolt. Commutator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The brushes of a DC machine should be placed on the commutator in the polar axis. armature in the polar axis. commutator in the inter polar axis. armature midway between poles. commutator in the polar axis. armature in the polar axis. commutator in the inter polar axis. armature midway between poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is increased, the power factor is unity power factor leading power factor lagging power factor None of these unity power factor leading power factor lagging power factor None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to DOL starting, a cage induction motor with star-delta starting shall have more starting torque. more starting time. smoother acceleration. reduced starting current. more starting torque. more starting time. smoother acceleration. reduced starting current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors. Calculate the back emf produced when it is running at a speed of 1500 rpm. 220 volt. 440 volt. 240 volt. 230 volt. 220 volt. 440 volt. 240 volt. 230 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an auto transformer, for what value of turn ratio, power transferred by inductively and conductively are same? 1 any of the above 0.5 0 1 any of the above 0.5 0 ANSWER DOWNLOAD EXAMIANS APP
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