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← ScienceWhich consequence results when cryogenic liquid helium at 4.2K leaks into a poorly insulated MRI superconducting magnet?
A)Quench induces rapid resistance heating✓
B)Superconductivity improves unexpectedly system-wide
C)Magnetic field stabilizes, improving resolution
D)Coolant efficiency dramatically exceeds initial expectation
💡 Explanation
A quench will rapidly boil the remaining liquid helium, because vigorous heat transfer causes the rapid phase change by latent heat release; therefore, the coils' resistance increases rapidly rather than remaining superconducting, causing intense ohmic heating.
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