✔ 最佳答案
In the actual fact, questions like these can easily be found by searching on the web.
Q: What is Piezoelectricity?
"Piezoelectricity" is the ability of some materials (notably crystals and certain ceramics) to generate an electric potential in response to applied mechanical stress.
Q: What are the applications of piezoelectricity?
There are lots of applications of peizoelectricity. Common examples are sensors and transducers used in ultrasound detection and production. Others include uses in cigarette lighters and microphones.
You may refer to the following web-page for details:
http://en.wikipedia.org/wiki/Piezoelectric
