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Leyden jar

Leyden jar (lī´dən), form of capacitor invented at the Univ. of Leiden in the 18th cent. It consists of a narrow-necked glass jar coated over part of its inner and outer surfaces with conductive metal foil; a conducting rod or wire passes through an insulating stopper in the neck of the jar and contacts the inner foil layer, which is separated from the outer layer by the glass wall. By modern standards, the Leyden jar is cumbersome and inefficient. It is rarely used except in laboratory demonstrations of capacitance.

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Leyden jar

Leyden jar Earliest and simplest device for storing static electricity, developed c.1745 in Leyden, Holland. The original electrical condenser (capacitor), it consists of a foil-lined glass jar partly filled with water and closed with a cork through which protrudes a brass rod wired to the foil. To charge the jar, friction is applied to the tip of the rod.

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"Leyden jar." World Encyclopedia. . Encyclopedia.com. 23 Feb. 2018 <http://www.encyclopedia.com>.

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Leyden jar

Ley·den jar • n. an early form of capacitor consisting of a glass jar with layers of metal foil on the outside and inside.

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