Coulomb Torsion Balance

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Coulomb Torsion Balance

 

a torsion balance invented by C. Coulomb in 1784 and used by him for studying the interaction between point electric charges and magnetic poles. In 1789, H. Cavendish used the Coulomb torsion balance for gravitational measurements and determined the constant of gravitation. The basic principle of the balance—the suspension of the instrument's moving system on a fine elastic fiber or ribbon—is used in many modern high-sensitivity instruments, such as electrometers, magnetometers, and devices for measuring variations in gravity.

REFERENCE

Kudriavtsev, P. S. Istoriia fiziki, 2nd ed., vol. 1. Moscow, 1956. Page 375.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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