Discussion
A charged capacitor being discharged through a resistor has a Poynting vector that
Answer: A
Correct answer: carries energy out of the capacitor's field into the resistor
The energy was stored in the electric field between the plates, and during discharge it flows out through the space around the circuit and into the resistor, where the Poynting vector points inward through the resistor’s surface. This is the picture the theorem insists on: energy travels in the field surrounding the conductors, not along inside the wires, and the wires only guide it.
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