Electrical Machines If the excitation is reduced, the power factor is unity power factor None of these lagging power factor leading power factor unity power factor None of these lagging power factor leading power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines, the interpoles are provided to counteract the reactance voltage and the cross-magnetizi to make commutation spark less. both (B) and (C). to counteract demagnetizing effect of armature mmf in commutating zone. to counteract the reactance voltage and the cross-magnetizi to make commutation spark less. both (B) and (C). to counteract demagnetizing effect of armature mmf in commutating zone. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The short circuit test on a transformer is conducted to obtain hysteresis loss. copper losses. eddy current loss. core loses only. hysteresis loss. copper losses. eddy current loss. core loses only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has synchronous speed of 1500 rpm. What will be the slip when it is running at a speed of 1450 rpm? +3% -3.33% +3.33% -3% +3% -3.33% +3.33% -3% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The back emf produced in a dc motor depends on Z. P and Z. P. none of these. Z. P and Z. P. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer the magnetic coupling between the primary and secondary winding can be increased by using soft material for winding. using transformer oil of better quality. using the magnetic core of low reluctance. increasing the number of turns. using soft material for winding. using transformer oil of better quality. using the magnetic core of low reluctance. increasing the number of turns. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS