tinyurl.com/WS-VeritCircuit
www.phys-l.org/archives/2021/11_2021/threads.html
tinyurl.com/WS-HSPoynting
amasci.com/elect/poynt/poynt.html
en.wikisource.org/wiki/On_the_Transfer_of_Energy_in_the_Electromagnetic_Field
A recent “Veritasium” video incited considerable discussion on the Phys-L list—Derek Muller questions how energy is transported in circuits, invoking the Poynting vector and making (Poynting’s historical) case that energy is transported through the space directly between the source and the load as electric and magnetic fields. This is a wonderful example of appropriate models for appropriate learner—for instance, grade school children learn about electrons transporting energy through DC circuits as if electrons “put on an energy hat” at the battery and “drop their energy hat off” at the bulb filament. Later we learn about AC circuits and discover this can’t possibly be true—the electrons in the power company generators ultimately energizing my home never leave the generator windings, so those electrons can’t possibly transport energy to me. More sophisticated intermediate models like those widely championed by Modeling Physics and Chabay and Sherwood are now...