The two pressure coils of a single phase power factor meter have_________________?
Correct answer: A. the same dimensions and the same number of turns
- A. the same dimensions and the same number of turns
- B. the same dimension but different number of turns
- C. the same number of turns but different dimensions
- D. none of the above
Explanation
The two pressure coils of a single-phase dynamometer power-factor meter are made alike, with equal dimensions and equal turns, so their mechanical effects are symmetrical. Their pressure circuits then provide the required phase relationship for indication.
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