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← ScienceWhich 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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