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← ScienceWhich mechanism causes increased electrical resistance nearing absolute zero?
A)Decreased electron-phonon scattering events
B)Enhanced quantum tunneling through gaps✓
C)Suppressed Cooper pair formation onset
D)Increased electron mobility across barriers
💡 Explanation
Enhanced quantum tunneling increases resistance because, at extremely low temperature, electrons can tunnel through increasingly substantial band gaps in materials, thereby decreasing conductivity; therefore, tunneling is increased rather than scattering, mobility increase, or Cooper pair mechanisms.
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