Browse Definitions :
Definition

anode

Contributor(s): Matthew Haughn

An anode is the electrode in a polarized electrical device through which current flows in from an outside circuit.

Conversely, a cathode is the eletrode in a polarized electrical device through which current flows out. Cathodes get their name from cations (negatively charged ions) and anodes from anions (positively charged ions).

In a device that consumes electricity, the anode is the charged positive electrode. Such devices include diodes, electrolytic cells in hydrogen production, and secondary battery cells in recharging batteries. However, in a device that produces power, the anode is the negative terminal, due to the flow of electrons being reversed. Such devices include electrolytic cells in hydrogen production, vacuum tubes, cathode ray tubes, oscilloscopes and primary battery cells (this includes all non-rechargeable batteries).

In many applications, since the anode releases electrons to produce current, it gradually breaks down due to the weakening of the bonds between the cathode’s atoms.

Demonstration of cathode and anode in a battery:

This was last updated in June 2014

Continue Reading About anode

Join the conversation

1 comment

Send me notifications when other members comment.

Please create a username to comment.

Anion means negatively charged particles and cation means positively charged particles but in your article you have written anion is positively charged and cation is negatively charged why? Is it just a mistake or I'm wrong but in my book, which is prescribed by school, it is written that anion means negatively charged particles and cation means positively charged particles.
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • Whistleblower Protection Act

    The Whistleblower Protection Act of 1989 is a law that protects federal government employees in the United States from ...

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

SearchSecurity

  • challenge-response authentication

    In information security, challenge-response authentication is a type of authentication protocol where one entity presents a ...

  • Secure Shell (SSH)

    SSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system ...

  • honeypot (computing)

    A honeypot is a network-attached system set up as a decoy to lure cyberattackers and to detect, deflect or study hacking attempts...

SearchHealthIT

SearchDisasterRecovery

  • virtual disaster recovery

    Virtual disaster recovery is a type of DR that typically involves replication and allows a user to fail over to virtualized ...

  • tabletop exercise (TTX)

    A tabletop exercise (TTX) is a disaster preparedness activity that takes participants through the process of dealing with a ...

  • risk mitigation

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a data center.

SearchStorage

  • exbibyte (EiB)

    An exbibyte (EiB) is a unit used to measure data capacity.

  • zebibyte (ZiB)

    A zebibyte (ZiB) is a unit used to measure computing and storage capacity.

  • tiered storage

    Tiered storage is a way to assign different categories of data to various types of storage media with the objective of reducing ...

Close