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← ScienceWhich consequence results when exceeding the Curie temperature in a nickel-iron magnetic shield?
A)Shielding degrades from magnetic domains aligning✓
B)Shielding improves due to decreased permeability
C)Hysteresis loss diminishes sharply in the material
D)Eddy current reduction occurs progressively inside
💡 Explanation
Shielding is lost in magnetic materials above the Curie temperature because thermal energy disrupts the alignment of magnetic moments via the Curie-Weiss Law (paramagnetism), therefore the shield loses ferromagnetism rather than creating a lower-loss state.
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