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← ScienceWhich mechanism initiates diamagnetic expulsion when Niobium-Titanium is cooled?
A)Flux pinning prevents complete field expulsion
B)Meissner effect excludes interior magnetic fields✓
C)Thermal expansion alters critical temperature
D)Increased resistivity inhibits Lenz’s Law
💡 Explanation
The Meissner effect induces diamagnetic expulsion because supercurrents generate opposing magnetic fields, therefore completely excluding magnetic fields from the material’s interior, rather than material expansion or flux pinning dominating the response.
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