In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________?
Correct answer: C. exactly 90°
- A. exactly 0°
- B. approximately 0°
- C. exactly 90°
- D. approximately 90°
Explanation
One pressure-coil current is made nearly in phase with the supply voltage and the other nearly 90° out of phase by using a highly inductive circuit. In the ideal operating principle, their phase difference is exactly 90°.
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