Single Phase Motors
For the same rating, the efficiency of a single phase induction motor is _______ that of 3-phase induction motor.

Less than
More than
None of the listed here
The same as

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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 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
it revolves synchronously

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