Thursday 24 October 2019

electromagnetism - Poynting vector in a simple DC circuit


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This image I took from Wikipedia shows the directions of E(red) and B(green) and poynting vectors(blue) at different locations on the circuit. I don't seem to understand why the E fields(red) are pointing from up to down in that manner in between the circuit at plane P. Is it because the wire on the upper part is connected to the positive terminal and hence must E field lines must emanate from every part of the wire?




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