• electricity generated by subjecting certain crystals or ceramics to mechanical strain. The magnitude and orientation of the deformation will determine the electrical polarization. The most common substance exhibiting this phenomenon is quartz, and some of the applications of piezoelectricity include its use in oscillators, transducers, motors, and in instruments such as clocks and navigational aids. Conversely, when a material capable of generating piezoelectricity is exposed to an electric field, it will undergo mechanical deformation.

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