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← ScienceWhich outcome occurs when the Fermi level crosses extended band edges?
A)Increased electrical conductivity appears abruptly✓
B)Ferromagnetism becomes energetically favorable slowly
C)Superconducting transition temperature remains static
D)Negative thermal resistance stabilizes gradually
💡 Explanation
As the Fermi level crosses into a band, more electrons contribute to conduction via the band transport mechanism, because the density of states rises sharply; therefore, conductivity increases abruptly, rather than gradually altering magnetism or temperature behavior.
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