Power dissipation per unit area - wykład

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Power dissipation per unit area If we calculate the time average power dissipated per unit area of the interface, this is
Wa =
Z

0
Wvdz
=
Z

0
2|H0|2e−2z/δ
2σδ2 dz
= |H0|2
2σδ
= |Kx|2
2σδ
(9.20)
This is the same result as we would have obtained if the current had been assumed
to flow in a uniform sheet of thickness δ and conductivity σ. It is unexpected that this
equality occur, but since it has, it provides a simple basis for remembering the formula.
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