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← ScienceWhich consequence results when a ferromagnetic core is subjected to intense alternating current at its Curie temperature?
A)Increased hysteresis losses occur
B)Spontaneous magnetization decreases✓
C)Eddy currents are effectively reduced
D)Material attains permanent superparamagnetism
💡 Explanation
Spontaneous magnetization reduces because surpassing the Curie temperature causes a disruption of the ferromagnetic ordering via the exchange interaction. Therefore, magnetization diminishes drastically, rather than hysteresis increasing or favoring current reduction, below critical temperature.
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