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What (who) is cathode - definition

ELECTRODE FROM WHICH CONVENTIONAL CURRENT LEAVES A POLARIZED ELECTRICAL DEVICE

Cathodic; Kathode; Copper cathodes; Copper cathode; Cathodes

Cathode

·noun The part of a voltaic battery by which the electric current leaves substances through which it passes, or the surface at which the electric current passes out of the electrolyte; the negative pole;

- opposed to anode.

cathode

['ka???d]

¦ noun a negatively charged electrode. The opposite of anode.

?the positively charged electrode of an electrical device, such as a primary cell, that supplies current.

Derivatives

cathodal adjective

cathodic k?'??d?k adjective

Origin

C19: from Gk kathodos 'way down', from kata- 'down'+ hodos 'way'.

cathode

(cathodes)

A cathode is the negative electrode in a cell such as a battery. Compare anode
.

N-COUNT

Wikipedia

Cathode

A cathode is the electrode from which a conventional current leaves a polarized electrical device. This definition can be recalled by using the mnemonic CCD for Cathode Current Departs. A conventional current describes the direction in which positive charges move. Electrons have a negative electrical charge, so the movement of electrons is opposite to that of the conventional current flow. Consequently, the mnemonic cathode current departs also means that electrons flow into the device's cathode from the external circuit. For example, the end of a household battery marked with a + (plus) is the cathode.

The electrode through which conventional current flows the other way, into the device, is termed an anode.

https://en.wikipedia.org/wiki/Cathode

Examples of use of cathode

1. The cinema screen and the cathode ray have educated us in mob etiquette and protocol.

2. Are we supposed to go back to cumbersome cathode ray sets?

3. Gold and cathode copper, which is made from processed copper sulfide, are used in the manufacture of electronic goods.

4. But plasma sets can use up to four times as much electricity as the old–style cathode–ray tube models.

5. The plant, situated in Liangshi, northeastern China, will provide RusAl with half its annual cathode block needs.