Question 385Electricity & Electronics - QMED

The correct answer is C) Relatively high starting torque and relatively low running efficiency. The motor shown in figure "B" of the illustration EL-0207 is a split phase single phase motor. This type of motor is designed to have a higher starting torque compared to its running efficiency. The additional starting winding included in the split phase design provides the extra torque needed to overcome the initial inertia when the motor is starting up, but this additional winding also increases the overall losses in the motor during normal running operation, resulting in a relatively lower running efficiency. The other answer choices are incorrect because A) describes a capacitor-start motor, B) describes a repulsion-start induction motor, and D) describes a capacitor-run motor, all of which have different operational characteristics compared to the split phase motor shown in the illustration.