The power transformer is a constant______________?
Correct answer: D. main flux device
- A. voltage device
- B. current device
- C. power device
- D. main flux device
Explanation
A transformer operates as a constant-flux device because its applied voltage, frequency, and turns determine the core flux, which remains nearly constant from no-load to full-load. The phrase “main flux device” is an awkward wording for this standard concept.
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