The armature winding of a 200-V, 4-pole, series motor is lap-connected. There are 280 slots and each slot has 4 conductors. The current is 45A and the flux per pole is 18mWb. The field resistance is...

The armature winding of a 200-V, 4-pole, series motor is lap-connected. There are 280 slots and each slot has 4 conductors. The current is 45A and the flux per pole is 18mWb. The field resistance is 0.3-ohm and the armature resistance 0.5-ohm. Find the speed of the motor.