Electrical Machines Commutator in DC generator is used for increase efficiency reduce losses collecting of current convert AC armature current in to DC increase efficiency reduce losses collecting of current convert AC armature current in to DC ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For satisfactory performance of 3-phase 480V, 60 Hz induction motor, the supply voltage at 50 Hz should be equal to 350 V. 420 V. 480 V. 400 V. 350 V. 420 V. 480 V. 400 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When flux density is constant in a transformer, hysteresis loss varies as V² V f f² V² V f f² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator pitches of duplex and simplex lap windings are respectively 4 ang 1 2 and 1 4 and 2 2 and 2 4 ang 1 2 and 1 4 and 2 2 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In auto transformer if the turn ratio is K, what is the power transferred inductively? both A and B (1-K) × input power None of these K × input power both A and B (1-K) × input power None of these K × input power ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When operating, two or more transformers in parallel, % impedance of these transformers should be same. inversely proportional to MVA rating of transformers. proportionate to MVA rating of transformers. such that actual impedance of all transformers would be same. same. inversely proportional to MVA rating of transformers. proportionate to MVA rating of transformers. such that actual impedance of all transformers would be same. ANSWER DOWNLOAD EXAMIANS APP
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