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← ScienceFor an MRI electromagnet cooled by liquid helium, which consequence results should the active cooling system fail?
A)Quench causes rapid magnetic collapse✓
B)Reduced coil resistance reduces field
C)Increased eddy currents improve SNR
D)Current stabilizes through thermal runaway
💡 Explanation
A quench event leads to rapid magnetic collapse because the Meissner effect ceases and the superconductivity is lost at higher temperatures, therefore resistance appears suddenly, rather than stabilizing the field.
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