The hysteresis loss in a D.C. machine least depends on____________?
Correct answer: D. Rate of flow of ventilating air
- A. Frequency of magnetic reversals
- B. Maximum value of flux density
- C. Volume and grade of iron
- D. Rate of flow of ventilating air
Explanation
Hysteresis loss depends mainly on frequency of reversal, maximum flux density, and the volume and magnetic quality of the iron. Ventilation affects heat removal, not the amount of hysteresis loss produced.
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