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Which outcome results when thermal gradients induce stress inside a piezoelectric crystal?

A)Charge migration aligns with stress
B)Crystal lattice undergoes plastic deformation
C)Resonant frequency decreases linearly
D)Dielectric constant approaches zero

💡 Explanation

Stress creates deformation, stimulating **piezoelectric effect** because mechanical strain changes the internal polarization, resulting in local charge build-up matching the stress areas. Because of the piezoelectric effect, charge aligns rather than causing plastic flow; temperature variations shift resonant frequencies rather than causing a linear decrease.

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