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← ScienceWhich mechanism initiates current flow without resistance when a superconducting magnet quenches?
A)Flux pinning prevents trapped flux motion
B)Thermoelectric effect generates reverse voltage
C)Meissner effect expels magnetic fields✓
D)Kinetic inductance limits current changes
💡 Explanation
The Meissner effect causes a rapid expulsion of magnetic field when a superconducting magnet loses its superconductivity because the magnetic field is suddenly excluded. Therefore, quenching begins with the Meissner effect, rather than flux pinning which resists flux movement under stable conditions.
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