In electrodynamics, Poynting's theorem is a statement of conservation of energy for electromagnetic fields, developed by the British physicist John Henry Poynting. It states that within a given volume the stored energy changes at a rate equal to the work done on the charges inside the volume minus the rate at which energy leaves the volume, a relationship strictly true only in non-dispersive media though it can be extended to the dispersive case, and it is mathematically analogous to the work-energy theorem of classical mechanics and to the continuity equation.
Facts
StatementThe rate of energy transfer per unit volume out of a region of space equals the rate of work done on the charge distribution in that region plus the energy flux leaving through the region boundary. 1 Classification
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Source Poynting's theorem, Wikipedia
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1. Poynting's theorem, Wikipedia
Definition section
Poynting's theorem states that the rate of energy transfer per unit volume from a region of space equals the rate of work done on the charge distribution in the region, plus the energy flux leaving that region.
References
Poynting, J. H. (January 1884). "On the Transfer of Energy in the Electromagnetic Field"
In Group: Electromagnetism, Optics and Continuum Mechanics, Lead section
In electrodynamics, Poynting's theorem is a statement of conservation
In Branch: Mathematical Physics, Lead section
In electrodynamics, Poynting's theorem is a statement of conservation
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