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The talk of apt metaphors for an electrical circuit brings me to that great grand daddy of electrical explanatory aids, the water pump, feeding plumbing, with constrictions.
In that context, the head is the work of the pump, the flux is that of water particles not charge, and what is lost is head at a constriction, and the cumulative head lost equates to the pump's head. This model seems not to mesh well with energy source/sinks.
Brian Whatcott Altus OK