Time : 30 Minutes Q/A 480 V, 988 r.p.m. d.c. shunt motor its full-load efficiency of 88 percent. The armature circuit resistance is 0.19 2, the motor input current is 72 A and there is total voltage...

Extracted text: Time : 30 Minutes Q/A 480 V, 988 r.p.m. d.c. shunt motor its full-load efficiency of 88 percent. The armature circuit resistance is 0.19 2, the motor input current is 72 A and there is total voltage drop of 1.8 V at the brushes. The field current is 1.66 A. Determine (i) The motor output power (ii) The mechanical torque in N-m.