Electrical Machines A 2 KVA transformer has iron loss of 150 W and full load copper loss of 250 W. The maximum efficiency of the transformer would occur when the total loss is 500 W 300 W 400W 250 W 500 W 300 W 400W 250 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will shift forward by less than 90° shift forward by 90° coincide with the GNA shift forward by more than 90° shift forward by less than 90° shift forward by 90° coincide with the GNA shift forward by more than 90° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor when started on no load does not accelerate up to full speed but runs at 1/7th of the rated speed. The motor is said to be crawling. locking. cogging. plugging. crawling. locking. cogging. plugging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature shaft must be able to withstand twisting strains due to transmission of torque. All of these bending moment due to weight of the armature. any unbalanced magnetic pull on the armature core. twisting strains due to transmission of torque. All of these bending moment due to weight of the armature. any unbalanced magnetic pull on the armature core. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors has negative speed regulation? Series motors. Both B and C. Shunt motors. Differential compound motors. Series motors. Both B and C. Shunt motors. Differential compound motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 20KVA auto transformer, turn ratio is 0.8. Find the power transferred conductively? 0KVA 4KVA 16KVA 20KVA 0KVA 4KVA 16KVA 20KVA ANSWER DOWNLOAD EXAMIANS APP
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