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← ScienceWhich mechanism causes stable operation of superconducting magnets?
A)Flux pinning prevents magnetic vortex motion✓
B)Giant magnetoresistance enables current regulation
C)Quantum tunneling shorts external circuits
D)Coulomb blockade isolates magnet domains
💡 Explanation
Flux pinning arises from material defects interacting with magnetic flux lines, preventing motion of vortices and associated energy dissipation, because that would heat it above Tc. Therefore flux pinning is crucial, rather than other disruptive quantum effects.
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