Electrodes
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Electrodes
Electrodes (/ɪˈlɛktroʊdz/) are conductive materials that are used to make contact with nonmetallic parts of a circuit, and are the sites where the electrochemical reactions occur. The term is derived from the Greek words "electron" meaning amber, from which the word 'electricity' is derived, and "hodos" meaning way.
Types of Electrodes
There are several types of electrodes, including:
- Metal Electrodes: These are electrodes made from metal, such as copper or silver. They are often used in electrochemical cells.
- Non-Metal Electrodes: These are electrodes made from non-metal materials, such as graphite or silicon. They are often used in semiconductor devices.
- Liquid Electrodes: These are electrodes that are in a liquid state. They are often used in electrolysis.
- Gas Electrodes: These are electrodes that are in a gaseous state. They are often used in gas discharge tubes.
Applications of Electrodes
Electrodes have a wide range of applications, including:
- Electrolysis: Electrodes are used in electrolysis to facilitate the movement of ions in the electrolyte.
- Batteries: Electrodes are used in batteries to facilitate the flow of electrons from the anode to the cathode.
- Electrocardiography: Electrodes are used in electrocardiography to measure the electrical activity of the heart.
- Electroencephalography: Electrodes are used in electroencephalography to measure the electrical activity of the brain.
See Also
External links
- Medical encyclopedia article on Electrodes
- Wikipedia's article - Electrodes
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