Derivation of Poynting Vector Analysis - wykład

Derivation of Poynting Vector Analysis Maxwell's equations convert the above equation to
∂W
∂t
= E · (curlH− J) −H· (curl E − 0) (7.10)
where the absence of free magnetic charges is emphasised by the placement of a zero
in the second bracket. Using the vector identity
div(A× B) = B · curl A − A· curl B (7.11)
we are able to manipulate the above equation into the form
∂W
∂t
+ E · J + div (E ×H) = 0. (7.12
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