Dummy coil should not be used in_________________?
Correct answer: B. large machines
- A. small machines
- B. large machines
- C. either A. or B.
- D. none of the above
Explanation
A dummy coil contributes no useful generated emf, so it wastes space and copper and is avoided in large machines where this loss becomes significant. It may be tolerated in small machines to complete the winding mechanically.
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