A 200 V shunt motor has Ra = 0, 1 Ω, Rf = 240 Ω and rotational loss 236 Ω. On fullload, the line current is 9.8 A with the motor running at 1450 rpm. Determine:
(a) the mechanical power developed
(b) the power output
(c) the load torque
(d) the full-load efficiency.