Cathode

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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What Wikipedia says

A cathode is the electrode from which a conventional current leaves a polarized electrical device such as a lead–acid battery. This definition can be recalled by using the mnemonic CCD for cathode current departs. Conventional current describes the direction in which positive charges move.

Excerpt from the Wikipedia article “Cathode”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Original work:File:Zinc anode 2.png by User:MichelJullian (talk) Derivative work: KES47 (talk), CC BY-SA 3.0, via Wikimedia Commons.