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← ScienceWhich outcome occurs when a SQUID’s Josephson junction exceeds critical current?
A)Abrupt transition to normal conductivity✓
B)Quantum entanglement becomes decoherent
C)Increased sensitivity to magnetic fields
D)Enhanced energy gap within superconductor
💡 Explanation
Exceeding critical current in a SQUID forces a transition because the Cooper pairs break apart via current-induced depairing, disrupting *superconductivity*. Therefore, normal conductivity is restored, rather than sensitivity increasing due to maintained Cooper pair coherence.
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