Discussion
Consider the following statements about core loss.
1. Lamination reduces eddy current loss 2. Silicon raises the resistivity of the steel 3. Hysteresis loss rises as the square of the frequency
Answer: C
Lamination and silicon both attack the eddy current loss, one by restricting the current paths and the other by raising the resistance along them. Hysteresis loss rises with the first power of frequency; it is eddy current loss that goes as the square.
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