Electricity and Magnetism > EMF and Current
DCS# 5E60.20

PIEZOELECTRIC SPARKER



APPARATUS
dissected piezoelectric gas grill igniter
202-19-E1
neon bulb or galvanometer
202-18-D-1


DESCRIPTION
Pressing the button on the igniter cocks and then releases a spring-loaded striker.  When struck, the piezoelectric crystal produces a voltage that can be detected with a spark gap, a neon bulb, or an electroscope.

If the amplified output of a function generator is connected across the crystal, it can be heard faintly.  It is loudest around 9 kHz.