Leyden jar

The Leyden jar was the original capacitor, developed in the 18th century and used to conduct many early experiments in electricity.

Description

The device was a glass jar coated inside and out with metal. The inner coating was connected to a rod that passed through the lid and ended in a metal ball. Typical designs consist of an electrode and a plate, each of which stores an opposite charge. These two elements are conductive and are separated by an insulator (e.g., the glass dielectric). The charge is stored at the surface of the elements, at the boundary with the dielectric.

Related Topics:
Electrode - Dielectric

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