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← ScienceWhich mechanism causes zero electrical resistance within superconducting toroidal SQUID rings?
A)Flux quantization maintains circulating current✓
B)Increased phonon vibrations scatter fermions
C)Thermal expansion eliminates electron collisions
D)Diamagnetism confines displaced magnetic fields
💡 Explanation
Flux quantization maintains circulating supercurrents because magnetic flux becomes quantized in integer multiples of flux quanta due to the formation of macroscopic quantum states; therefore, current persists indefinitely with no resistance, rather than resistance arising from other scattering effects.
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