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← ScienceWhich consequence impairs a transformer when it overheats above its Curie temperature?
A)Demagnetization reduces core permeability massively✓
B)Eddy currents induce core saturation
C)Hysteresis losses minimally reduce efficiency
D)Dielectric breakdown raises insulation resistance
💡 Explanation
Above the Curie temperature, spontaneous magnetization vanishes via the phenomenon of magnetic disordering. Because the ferromagnetic core loses its alignment, reducing permeability massively, therefore transformer efficiency plummets, rather than improved dielectric insulation.
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