Explore: Poynting Theorem

Poynting's theorem is a statement of conservation of energy for electromagnetic fields that was developed by British physicist John Henry Poynting. It

In physics, the Poynting vector (or Umov–Poynting vector) represents the directional energy flux (the energy transfer per unit area, per unit time) or

eponym of the Poynting vector, which describes the direction and magnitude of electromagnetic energy flow and is used in the Poynting theorem, a statement

electromagnetic field Poynting's theorem on conservation of energy in electromagnetic field Poynting (lunar crater), crater on the Moon Poynting (Martian crater)

Luminous flux Magnetic flux Magnetic flux quantum Neutron flux Poynting flux Poynting theorem Radiant flux Rapid single flux quantum Sound energy flux Volumetric

theorem (proof theory) Deduction theorem (logic) Diaconescu's theorem (mathematical logic) Easton's theorem (set theory) Erdős–Dushnik–Miller theorem

Applying the divergence theorem, the rate of flow of energy out of the volume is seen to be related to the surface integral of the Poynting vector over the surface

"On attractions, and on Clairaut's theorem". The Cambridge and Dublin Mathematical Journal. 4: 194–219. Poynting, John Henry; Joseph John Thompson (1907)

Earnshaw's theorem states that a collection of point charges cannot be maintained in a stable stationary equilibrium configuration solely by the electrostatic

rewritten to something that can be interpreted physically, namely the Poynting vector. Using the product rule and Faraday's law of induction gives ∂ ∂