Discussion
Which of the following materials exhibits piezoelectric behavior, allowing it to generate a voltage when mechanical stress is applied?
Answer: B
Quartz crystal exhibits the piezoelectric effect, and generates a voltage when mechanical stress is applied. It is used in lighters, sensors and crystal oscillators. Polyvinyl chloride is an ordinary plastic, stainless steel is a metal alloy and gray cast iron is a casting alloy, and none of them is a piezoelectric material.
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