Question: A 2 2 0 V , 5 0 0 A , 6 0 0 rpm separately excited DC motor has armature and field resistance of

A 220V,500A,600rpm separately excited DC motor has armature and field resistance of 0.020hm and 10 ohm respectively.
The load torque is expressed as:
TL=2000-2N, where N is the motor speed in rpm.
Calculate the motor terminal voltage and armature current
(a) For motor speed of 450rpm.
(b) For motor speed of 750 rpm.

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