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Which outcome occurs when compressive stress exceeds a crystal's limit?

A)Dislocation glide causes plastic deformation
B)Piezoelectric effect generates voltage
C)Vacancy diffusion increases conductivity
D)Increased electron-phonon scattering reduces mobility

💡 Explanation

Plastic deformation occurs because dislocation glide is initiated when stress surpasses a crystal's shear strength; therefore, the crystal permanently deforms, rather than simply exhibiting piezoelectricity, which would require a non-centrosymmetric structure with lower stress levels.

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