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Which mechanism causes increased electrical resistance when polycrystal grain boundaries misalign?

A)Impeded electron wave constructive interference
B)Increased phonon dispersion momentum transfer
C)Enhanced point defect electron scattering
D)Raised Fermi level electron degeneracy

💡 Explanation

Electron wave transmission is affected by mismatched crystalline regions, because electron diffraction increases when periodic potential alters, therefore impeding electron wave constructive interference increases resistance, rather than alternate scattering from phonon/point defects without wave behavior consideration.

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