Electrical Machines A 250 volt dc series motor having an armature resistance of 0.2 Ω takes a load current of 60 A. What will be the torque produced at the shaft of the motor? Consider brush drop of 1V. 266.20 N-m. can not be determined. 133.22 N-m 234.76 N-m. 266.20 N-m. can not be determined. 133.22 N-m 234.76 N-m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1200 1203 1080 1000 1200 1203 1080 1000 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Methods of synchronizing of alternator may be done by all of these. one dark two bright. all dark lamp method. all bright lamp method. all of these. one dark two bright. all dark lamp method. all bright lamp method. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Star - delta method of starting of motor is not possible in case of low horse power motor. high torque motor. high speed motor. single phase induction motor. low horse power motor. high torque motor. high speed motor. single phase induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Semi closed slots or totally closed slots are used in induction motors, essentially to decrease starting torque improve starting torque increase pull out torque reduce magnetising current and improve power factor decrease starting torque improve starting torque increase pull out torque reduce magnetising current and improve power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the methods to reduce the armature reaction and its effects? All of these pole chamfering compensating winding pole stacking All of these pole chamfering compensating winding pole stacking ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS