Iron losses in a D.C. machine are independent of variations in______________?
Correct answer: B. load
- A. speed
- B. load
- C. voltage
- D. speed and voltage
Explanation
Iron losses are mainly set by flux density and frequency, which are approximately constant in a D.C. generator at normal operation, so they are treated as independent of load. Copper losses, in contrast, vary strongly with load current.
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