Which of the following single-phase induction motors is generally used in time phonographs ?
Correct answer: C. Shaded pole
- A. Resistance start
- B. Capacitor start capacitor run
- C. Shaded pole
- D. Universal
Explanation
Shaded-pole motors are simple, inexpensive and suitable for the very small power needed in phonographs and similar timing or household mechanisms. Their low starting torque is acceptable in these applications.
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