A 220-volt shunt motor has an armature resistance of 0.32 ohm and a field resistance of 110 ohms. At no load, the armature current is 6 amp and the speed is 1800 rpm. Calculate (a) the speed when the rated line current is 62 amp. (b) the speed regulation of the motor. Assume a 2-volt brush at full load.

In the series motor, the armature resistance is 0.1Ohm and the field resistance is 0.15Ohm and it is taking 50A of the current aand the valeu of the supply voltage is 230V and value of the rpm is 720 rpm. The loses present in the circuit as core and the friction is 650W. Neglect all other losses. Determine the value of the output power.

1. A 100 v dc series motors run at 400 rpm when taking a current of 55 Amp. Armature resistance is 0.03 ohm, field resistance is 0.03 ohm. If the load torque remains the same. What is the input current when the field is shunted by a resistor of 0.02 ohm? 2. A four-pole lap wound 500 V shunt motor takes a full-load armature current of 50A, the full-load speed being 800 r.p.m. There are 440 armature conductors and armature resistance is 0.3 ohm, contact drop brush = 1 V.Find the useful flux per pole.