Electrical Machines When flux density is constant in a transformer, hysteresis loss varies as f f² V² V f f² V² V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are effects of armature reaction? increase the maintenance and repair increase the iron loss All of these increases the design cost increase the maintenance and repair increase the iron loss All of these increases the design cost ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In shapers and slotters which motor are preferred? Squirrel cage IM. Synchronous motor. Slip ring IM. Double cage motor. Squirrel cage IM. Synchronous motor. Slip ring IM. Double cage motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For high current and low current rating which winding is employed to DC machine? Lap winding Both lap and wave winding None of above Wave winding Lap winding Both lap and wave winding None of above Wave winding ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be 2 Ω. 10 Ω. 8 Ω. 4 Ω. 2 Ω. 10 Ω. 8 Ω. 4 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of stator rotating magnetic field (RMF) with respect to rotor is S.Ns Nr Ns Zero S.Ns Nr Ns Zero ANSWER DOWNLOAD EXAMIANS APP
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