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← ScienceWhich mechanism enables lossless current flow within a superconducting magnetic energy storage (SMES) coil?
A)Meissner effect expelling fields
B)Critical current amplitude damping
C)Flux pinning preventing vortices✓
D)Phonon scattering limiting resistance
💡 Explanation
Flux pinning allows lossless flow because it immobilizes magnetic flux vortices, preventing their motion from dissipating energy. Therefore, C is correct, rather than energy damping that only reduces amplitude, or phonon scattering which is an ordinary effect.
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