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← ScienceWhich instability results when a current-carrying wire is placed near a ferromagnetic core reaching its Curie temperature?
A)Increased inductive reactance is observed
B)Barkhausen jumps induce voltage noise✓
C)Magnetostriction creates mechanical resonance
D)Spontaneous magnetoelectric coupling occurs
💡 Explanation
Barkhausen jumps induce voltage noise because domain walls abruptly shift direction rather than smoothly rotating because the thermal energy approaches magnetic exchange energy, therefore causing sharp voltage spikes along nearby conductors, rather than inductive or mechanical effects in the non-ferromagnetic wire.
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