[Syllabus logo] Play-Doh Circuit

Play-Doh Circuit schematic Play-Doh Circuit realized

A power supply is used to drive a current through various cylinders of Play-Doh. By using an ammeter and voltmeter as shown, the resistance of a given length of Play-Doh can be determined. This configuration is used rather than a simple ohmmeter to avoid problems with contact resistance -- the Play-Doh tends to "break down" at the one contact!

Play-Doh experimental setup

Last updated March 11, 1999.
Copyright George Watson, Univ. of Delaware, 1996.