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Hysteresis motor is particularly- useful for high-quality record players and tape-recorders because | |
A. | it revolves synchronously [Wrong Answer] |
B. | it is not subject to any mag-netic or mechadical vibrations [Wrong Answer] |
C. | it can be easily manufactured in extremely small sizes of upto i W output [Wrong Answer] |
D. | it develops hysteresis torque which is extremely steady both in amplitude and phase [Correct Answer] |