A 120-V, 60-Hz, 4-pole, single-phase, capacitor-start motor has a main- winding impedance of 6+ j50 2 and an auxiliary-winding impedance of 5+j25 2. The rotor impedance at standstill is 8+ j5 2. The magnetization reactance is 150 2. If the starting capacitor is 100 μF, determine the start- ing torque developed by the motor. What is the torque developed by the motor in Exercise 10.5 when it oper- ates at a full-load speed of 1575 rpm? Determine its efficiency if the rota- tional loss is 10 W. Note that the motor runs on the main winding only at its rated speed.