Electrical Machines In a 3-phase induction motor, if the supply voltage and frequency are reduced by the same ratio, then slip at which maximum torque occurs is less and maximum torque increases more and maximum torque decreases less and maximum torque decreases more and maximum torque remains constant less and maximum torque increases more and maximum torque decreases less and maximum torque decreases more and maximum torque remains constant ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A frog leg winding is used in a DC machine to eliminate the use drum winding. the use of compensating winding. the use equalizer in lap winding. reactance voltage produced due to communication. the use drum winding. the use of compensating winding. the use equalizer in lap winding. reactance voltage produced due to communication. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In large sized DC machines the compensating windings are provided to None of these reduce eddy current losses by providing local short circuits. neutralize voltage induced in coil due to fluctuation of l compensate for the decrease in speed due to increase of load. None of these reduce eddy current losses by providing local short circuits. neutralize voltage induced in coil due to fluctuation of l compensate for the decrease in speed due to increase of load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the residual magnetism is of the order of 10 %. 15 %. 20 %. 2.5 %. 10 %. 15 %. 20 %. 2.5 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines, the interpoles are provided to make commutation spark less. to counteract demagnetizing effect of armature mmf in commutating zone. both (B) and (C). to counteract the reactance voltage and the cross-magnetizi to make commutation spark less. to counteract demagnetizing effect of armature mmf in commutating zone. both (B) and (C). to counteract the reactance voltage and the cross-magnetizi ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Tappings of a transformer are provided at the phase end of hv side at the middle of hv side at the neutral side end of hv side at the phase end of lv side at the phase end of hv side at the middle of hv side at the neutral side end of hv side at the phase end of lv side ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS