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Which mechanism causes increased electrical resistance when dislocations accumulate in a crystal lattice?

A)Phonon scattering by lattice imperfections
B)Increased electron mean free path
C)Reduced Fermi surface boundary effects
D)Enhanced Bloch wave transmission probability

💡 Explanation

Phonon scattering increases resistance because imperfections in the lattice disrupt the periodic potential; this disrupts electron flow through momentum transfer (phonon scattering). Therefore resistance increases, rather than decreasing conductivity caused by smoother lattice.

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