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← ScienceWhich mechanism underlies the Meissner effect in superconducting levitation?
A)Flux expulsion resisting field penetration✓
B)Thermal gradients creating magnetic domains
C)Impurity scattering trapping magnetic flux
D)Surface currents intensifying external fields
💡 Explanation
Flux expulsion causes the Meissner effect, completely excluding magnetic fields from the superconductor, therefore repulsion creates levitation rather than field penetration or domain formation, because those alter field distribution differently.
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