A 22-hp 240-V, 1200-r.p.m. 4-pole, d.c. shunt motor has a total of 620 conductors arranged in two parallel paths and yielding an armature circuit resistance of 0.3 Q. When it delivers rated power at rated speed, it draws a line current of 75 A and a field current of 4 A. Calculate ( i) the flux per pole (ii) the torque developed (iii) the rotational losses (iv) total losses expressed as a percentage of power. Find the result: