electroscope

[ ih-lek-truh-skohp ]

noun

1. a device for detecting the presence and determining the sign of electric charges by means of electrostatic attraction and repulsion, often between two pieces of gold leaf enclosed in a glass-walled chamber.

electroscope

/ ɪˈlɛktrəʊˌskəʊp; ɪˌlɛktrəʊˈskɒpɪk /

noun

1. an apparatus for detecting an electric charge, typically consisting of a rod holding two gold foils that separate when a charge is applied

Derived Forms

• electroscopic, adjective

Other Words From

• e·lec·tro·scop·ic [ih-lek-tr, uh, -, skop, -ik], adjective

Word History and Origins

Origin of electroscope¹

First recorded in 1815–25; electro- + -scope

Example Sentences

At any time in the drift, an electroscope exposed outside became rapidly charged.

From Project Gutenberg

The electroscope will now insulate well enough to show no appreciable collapse of the leaves in one or two hours' time.

From Project Gutenberg

The quartz electroscope is taken, and the insulating rod heated in the blow-pipe.

From Project Gutenberg

A charge is given to the electroscope, and the time required for a given degree of collapse of the leaves noted.

From Project Gutenberg

When a charged body is brought near the electroscope the leaves become charged similarly by induction.

From Project Gutenberg