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Which risk significantly increases above Curie temperature in ferromagnetic alloys used within an inductor core?

A)Sudden increase in core expansion
B)Catastrophic hysteresis energy losses
C)Abrupt transition to paramagnetism
D)Complete crystalline lattice deformation

💡 Explanation

Above the Curie temperature, increased thermal energy cancels the alignment of magnetic domains, initiating an abrupt transition to paramagnetism because it exceeds the exchange interaction strength affecting alignment. Therefore, significant function is disabled rather than hysteresis changes because these are subordinate to domain integrity.

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