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Re: Batteries

Joseph Bellina wrote:

...
since the
potential difference is sustained by the work-function difference. Or
did I miss something. If I didn't then, when current flows, energy is
delivered from where?

The work function "sets" the potential, but cannot sustain it.
The chemical reaction at the electrode is necessary to "help"
the electron climb up the work-function barrier when the
battery is under load. Look at this section:

http://www.monmouth.com/~jsd/physics/battery.htm#sec-battery-loaded

I just edited it a bit, so please hit "reload".