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On 2021/Nov/24, at 20:47, John Denker via Phys-l <phys-l@mail.phys-l.org> wrote:
The Pointing vector is neither necessary nor sufficient for
answering the questions posed by the video. You can perfectly
well figure out how the "big circuit" works using a lumped LC
model, which is vastly more appropriate to the introductory
physics course. So the Poynting vector is less important to
this circuit than the staircase was to the Three Stooges.