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Which mechanism causes increased electrical resistance in metallic crystal?

A)Phonon scattering disrupts electron flow
B)Increased grain boundary electron reflection
C)Quantum tunneling reduces electron mobility
D)Increased electron-phonon constructive interference

💡 Explanation

Increased temperature enhances ion vibrations within the crystal lattice; phonon scattering then interferes with electron movement, because the scattering increases resistance. Therefore increased resistance occurs, rather than electron assistance or increased tunneling at lattice imperfections.

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