Single Phase Motors
The direction of rotation of an hysteresis motor is determined by

retentivity of the rotor material
none of these
position of shaded pole with respect to main pole
interchanging the supply leads

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

it can be easily manufactured in extremely small sizes of up to 1 W output
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

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