Under no-load conditions, a certain motor operates at 1200 rpm with an armature current of 0.5Aand a terminal voltage of 480V. The armature resistance is 2Ω.Determine the speed and speed regulation if a load demanding a torque of 50 Nm is connected to the motor. Assume that the losses consist solely of heating of RA and frictional loss torque that is independent of speed.