Electroscope, Pith Ball Type

This pith-ball electroscope is used to detect the presence of a static electricity charge. The two lightweight “pith” balls suspended from the strings are attracted to objects with a static electric charge. The pith balls can also be charged by touching them to an object with a static electric charge.

The pith-ball electroscope is useful for detecting electric charges and for determining the polarity of an unknown charge. Instructions with experiments are included.