Single Phase Motors
Which of the following single-phase motors has relatively poor starting torque ?

Repulsion motor
Capacitor motor
Universal motor
All single phase motors have zero starting torque

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

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

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