Poynting theorem


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Related to Poynting theorem: Maxwell's equations

Poynting theorem

[′pȯint·iŋ ‚thir·əm]
(electromagnetism)
A theorem, derived from Maxwell's equations, according to which the rate of loss of energy stored in electric and magnetic fields within a region of space is equal to the sum of the rate of dissipation of electrical energy as heat and the rate of flow of electromagnetic energy outward through the surface of the region.
References in periodicals archive ?
(8) in comparison with the standard expression for EMEM tensor (6) does not influence the conventional Poynting theorem (e.g., Ref.
Thus we conclude that the expression for the electromagnetic energy-momentum tensor (8) should be valid in far zone and does not imply any changes in the formulation of the standard Poynting theorem. As a consequence both bound and radiative EM field components should have the same propagation (or retardation) rates determined by the velocity of light c.
It includes uniform waves, time harmonic fields, polarization, the Poynting theorem and nonelectromagnetic waves and problems.