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 develops hysteresis torque which is extremely steady both in amplitude and phase
it is not subject to any magnetic or mechanical vibrations

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Single Phase Motors
Which of the following statements regarding hysteresis motor is in incorrect ?

It accelerates from rest to full-speed almost instantaneously
It is extremely quiet in operation
It is extremely sensitive to fluctuations in supply voltage
Its high starting torque is due to its high rotor hysteresis loss

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