Which of the following motors will operate at high power factor ?

A split phase motor is a type of single-phase induction motor that uses two windings to create a rotating magnetic field. The two windings are out of phase with each other, which creates a torque that causes the motor to rotate. Split phase motors typically have a power factor of around 0.65.

A capacitor start motor is a type of single-phase induction motor that uses a capacitor to improve the starting torque of the motor. The capacitor provides a leading current that helps to offset the lagging current of the motor, resulting in a higher starting torque. Capacitor start motors typically have a power factor of around 0.75.

In conclusion, the capacitor run motor is the only type of motor listed that will operate at a high power factor.