what is the output of piezoelectric if piezo material is under stress,

the output is DC or AC?
what is the relationship between voltage and current? is the high voltage produce high current? V=IR

 

Hello,

The output of the piezo sensor is depended on the force on the sensor.
Take a look at the PDF's on this page:
http://www.morganelectroceramics.co...piezoelectric-dielectric-ceramic/?301Redirect
(they are called chapters there).

This is a page from this page of the EDUCYPEDIA on Piezo sensors:
http://www.educypedia.be/electronics/sensorspiezo.htm

Bertus