Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

electric arc




A high-current electric discharge between two electrodes. The current is carried by the gas plasma maintained by the discharge. Sodium and neon lights exemplify large relatively cool arcs, while arc-welding uses a small very hot arc between a slowly consumed electrode and the workpiece. Lightning is a naturally occurring arc. See also arc lamp.


Related categories

   • ELECTRICITY AND MAGNETISM
   • TECHNOLOGY