Single Phase Motors
Which of the following motor can be used for unity power factor?

Capacitor run motor
Scharge motor
Shaded pole motor
Hysteresis motor

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Single Phase Motors
Hysteresis motor is particularly useful for high-quality record players and tape-recorders because

it is not subject to any magnetic or mechanical vibrations
it revolves synchronously
it can be easily manufactured in extremely small sizes of up to 1 W output
it develops hysteresis torque which is extremely steady both in amplitude and phase

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