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โ ScienceWhich phenomenon prevents current flow above critical field?
A)Magnetic field penetration (๐)โ
B)Flux pinning reduction (๐ฝc)
C)Gapless excitations increase (โ)
D)Cooper pair density shifts (๐s)
๐ก Explanation
Magnetic field penetration disrupts superconductivity because the Meissner effect is overcome, therefore the magnetic field penetrates into the material, rather than remaining excluded, which restores normal resistivity at higher fields.
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