Single Phase Motors
Which of the following statements regarding a reluctance motor is incorrect ?

It requires no D.C. field excitation for its operation
It cannot be reversed, ordinarily
Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluc-tance path between stator and rotor
It is nothing else but a single-phase, salient pole synchronous-induction motor

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

it develops hysteresis torque which is extremely steady both in amplitude and phase
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

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