Energy transfer in electrical circuits: A qualitative account

Igal Galili*, Elisabetta Goihbarg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

We demonstrate that the use of the Poynting vector for a model of the surface charge of a current carrying conductor can help qualitatively explain the transfer of energy in a dc closed circuit. The application of the surface charge model to a simple circuit shows that electromagnetic energy flows from both terminals of the battery, mainly in the vicinity of the wires (and not inside them) to the load where it enters and is converted into heat at a rate obtained from Ohm's law.

Original languageEnglish
Pages (from-to)141-144
Number of pages4
JournalAmerican Journal of Physics
Volume73
Issue number2
DOIs
StatePublished - Feb 2005

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