anodeˈæn oʊd
anode (n)
anode (n)
- plural
- anodes
English Definitions:
anode (noun)
a positively charged electrode by which electrons leave an electrical device
anode (noun)
the negatively charged terminal of a voltaic cell or storage battery that supplies current
anode (Noun)
the electrode of an electrochemical cell at which oxidation occurs
anode (Noun)
the electrode through which current flows into a device or cell (the positive terminal of an electrolytic cell or the negative terminal of a galvanic cell)
anode (Noun)
the terminal through which current flows into a diode when current is in the forward direction regardless of the direction the current is actually flowing
Anode
An anode is an electrode through which electric current flows into a polarized electrical device. The direction of electric current is, by convention, opposite to the direction of electron flow. In other words, the electrons flow from the anode into, for example, an electrical circuit. Mnemonic: ACID. A widespread misconception is that anode polarity is always positive. This is often incorrectly inferred from the correct fact that in all electrochemical devices, negatively charged anions move towards the anode and positively charged cations move away from it. In fact anode polarity depends on the device type, and sometimes even in which mode it operates, as per the above electric current direction-based universal definition. Consequently, as can be seen from the following examples, the anode is positive in a device that consumes power, and the anode is negative in a device that provides power: ⁕In a discharging battery or galvanic cell, the anode is the negative terminal because it is where the current flows into "the device". This inward current is carried externally by electrons moving outwards, negative charge moving one way constituting positive current flowing the other way.
Anode
An anode is an electrode of a polarized electrical device through which conventional current enters the device. This contrasts with a cathode, an electrode of the device through which conventional current leaves the device. A common mnemonic is ACID, for "anode current into device". The direction of conventional current (the flow of positive charges) in a circuit is opposite to the direction of electron flow, so (negatively charged) electrons flow out the anode of a galvanic cell, into an outside or external circuit connected to the cell. For example, the end of a household battery marked with a "-" (minus) is the anode. In both a galvanic cell and an electrolytic cell, the anode is the electrode at which the oxidation reaction occurs. In a galvanic cell the anode is the wire or plate having excess negative charge as a result of the oxidation reaction. In an electrolytic cell, the anode is the wire or plate upon which excess positive charge is imposed. As a result of this, anions will tend to move towards the anode where they will undergo oxidation. Historically, the anode of a galvanic cell was also known as the zincode because it was usually composed of zinc.: pg. 209, 214
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