Im aware that the complex electromagnetic powerflow from a solid is described by the poynting vector (see 1.1), however Im not sure how the 1/2 term arises in the formula(adsbygoogle = window.adsbygoogle || []).push({});

[tex]1/2\oint\vec{E} \times \vec{H}.ds[/tex] (1.1)

where [tex]\times[/tex] = vector cross product and ds denotes a variance in the surface of the object

From the textbook I read, it says that [tex]\vec{E}[/tex] and [tex]\vec{H}[/tex] are peak phasors, not RMS which is meant to explain the 1/2 term, but from my understanding, the Vrms of a sinusoidal is always Vpeak/sqrt(2) where Vpeak = peak voltage of sinusoid. So Im really confused

Can anyone help me out here ?

cheers

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# Poynting vector power flow question

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