8.A. One characteristic of a typical universal motor is that it A. is usually designed for low-speed operation. B. has a low locked-rotor torque. C. operates at about the same speed on a-c and doc circuits.  8.B. A centrifugal starting switch in a split-phase motor operates on the principle that A. a high starting current opens the switch contacts. B. a higher speed changes the shape of a disk to open the switch contacts. C. the actuating weights move outward as the motor slows down.

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Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.