Q3A 250 V DC shunt motor has armature resistance of 0.252. It takes an armature current of 50 A runs at 750 r.p.m. If the flux of the motor is reduced by 10% without changing the load torque.find:...

Extracted text: Q3A 250 V DC shunt motor has armature resistance of 0.252. It takes an armature current of 50 A runs at 750 r.p.m. If the flux of the motor is reduced by 10% without changing the load torque.find: 1-Draw the equivalent circuit of the shunt DC motor. 2-The new speed of the motor. 3-The developed torque,when Pmech.losses=zero BoRorotor