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Which mechanism causes increased electrical resistance when phonon scattering intensifies in a crystal lattice?

A)Decreased electron mean free path
B)Increased electron effective mass
C)Raised conduction band energy
D)Reduced Fermi level degeneracy

💡 Explanation

Elevated temperature affects the electron transport because increased atomic vibrations intensify phonon scattering, leading to a decreased electron mean free path; therefore resistance rises rather than other band structure alterations due to the increased collisions.

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