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Which outcome results when a mechanical stress exceeds a crystal's limit?

A)Dislocation motion causes plastic deformation
B)Increased electron band-gap occurs
C)Piezoelectric charge accumulates uniformly
D)Superconductivity abruptly emerges locally

💡 Explanation

Plastic deformation results from high stress because dislocation motion, a form of crystal slip involving movement through the lattice, exceeds the atomic bonding limits; therefore slip bands form, rather than piezoelectric effects or superconductivity, which arise from different conditions.

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