Q. The hysteresis loss in a D.C. machine least depends on
A. Frequency of magnetic reversals
B. Maximum value of flux density
C. Volume and grade of iron
D. Rate of flow of ventilating air
Answer: 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
Answer: Rate of flow of ventilating air