A d.c. chopper is used to control the speed of d.c. shunt motor. The supply voltage to the chopper is 220V. The on-time and off-time of the chopper is 10 ms and 12 msec, respectively. Assuming continuous conduction of the motor current, and neglecting the armature inductance, determine the average load current when the motor runs at a speed of 146.60 rad's and has a voltage constant K, of 0.495 V/A rad/s.
[Ans 9.2 A.]