The chopper used for on-off control of a de separately-excited motor has supply voltage of 230 V dc, an on-time of 10 m sec and off-time of 15 m sec. Neglecting armature inductance and assuming continuous conduction of motor current, calculate the average load current when the motor speed is 1500 rpm and has a voltage constant of K, = 0.5 V/rad per sec. The armature resistance is 3 22..