The piezoresistive effect describes change in the electrical resistivity of a semiconductor when mechanical stress is applied. In contrast to the piezoelectric effect, the piezoresistive effect only causes a change in electrical resistance, not in electric potential.
Read more about Piezoresistive Effect: History, Mechanism, Piezoresistive Silicon Devices
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“Before the effect one believes in different causes than one does after the effect.”
—Friedrich Nietzsche (1844–1900)