You searched for: “gold leaf electroscope
gold-leaf electroscope, gold leaf electroscope
A device consisting of two pieces of thin gold foil, or gold leaf, joined at their upper ends and suspended inside a glass jar.

When an electric charge is applied to the terminal connected to the gold leaves, they spread apart because of the repulsion of the same levels or amounts of charges on them.

This entry is located in the following unit: electro-, electr-, electri- (page 93)