Electrical Machines If the load current and flux of a DC motor are held constant and voltage applied across it armature is increased by 5%, the speed of the motor will Increase by 5%. Remain unchanged. Depends on other factor. Reduce by 5%. Increase by 5%. Remain unchanged. Depends on other factor. Reduce by 5%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature coil is short circuited by brushes when it lies along neutral axis. in none of above positions. in any of above positions. along field axis. along neutral axis. in none of above positions. in any of above positions. along field axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field winding was wrongly connected field resistance was higher than critical resistance field system lost residual magnetism there was a break in the armature circuit field winding was wrongly connected field resistance was higher than critical resistance field system lost residual magnetism there was a break in the armature circuit ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What will be the eddy current loss if the supply frequency of a transformer becomes double? Eight times. Four times. Remains same. Doubled. Eight times. Four times. Remains same. Doubled. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 1500 rpm. 3000 rpm. 4000 rpm. 3600 rpm. 1500 rpm. 3000 rpm. 4000 rpm. 3600 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine armature winding has thin leads whereas field winding has thick leads both the windings have thin leads armature winding has thick leads whereas field winding has thin leads both the windings have thick leads armature winding has thin leads whereas field winding has thick leads both the windings have thin leads armature winding has thick leads whereas field winding has thin leads both the windings have thick leads ANSWER DOWNLOAD EXAMIANS APP
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