The efficiency of a transformer will be maximum when_____________?
Correct answer: D. copper losses = iron losses
- A. copper losses = hysteresis losses
- B. hysteresis losses = eddy current losses
- C. eddy current losses = copper losses
- D. copper losses = iron losses
Explanation
Transformer efficiency is maximum when variable copper loss equals the nearly constant iron loss. This follows because increasing load raises copper loss while iron loss remains approximately unchanged.
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