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Which outcome occurs when resonant frequency rises excessively in piezoelectric crystal used for actuators?

A)Crystal lattice structure fractures
B)Increased charge carrier recombination
C)Augmented polarization domain alignment
D)Enhanced electron-hole excitation

💡 Explanation

Fractures occur because the excessive resonant frequency causes amplified mechanical stress due to internal positive feedback of the piezoelectric effect; therefore the crystal fractures under strain rather than experiencing charge carrier recombination or altered polarization when these frequencies aren't met.

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