Encyclopedic Dictionary of Polymers

2011 Edition
| Editors: Jan W. Gooch


  • Jan W. Gooch
Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-6247-8_12725

\wät\ n [James Watt † 1819] (1882) The SI unit of power, equal to 1 J/s (= 1 m·N/s), expressing the rate at which work is done or energy expended. In the case of alternating electric current the watt is computed as the product of voltage across the circuit, times the current flow in amperes times the cosine of the phase angle between the current and the impressed voltage. In purely resistive DC circuits, watts = volts × amperes. Some conversions of other power units to SI are given in the Appendix.

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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jan W. Gooch
    • 1
  1. 1.AtlantaUSA