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← ScienceWhich outcome results when applying excessive voltage across a piezoelectric crystal?
A)Crystal over-polarization induces domain switching✓
B)Increased efficiency of phonon scattering
C)Accelerated chemical surface oxidation occurs
D)Reduced sensitivity to mechanical stress
💡 Explanation
Excessive voltage can cause crystal depolarization because the electric field exceeds the coercive field, leading to domain switching. Therefore, the crystal can over-polarize, rather than exhibit increased phonon scattering, which is related to thermal properties.
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