This problem investigates what fraction of the available charge must be transferred from one conductor to another to produce a typical contact potential, (a) As a rough approximation, treat the conductors as 10 cm X 10 cm square plates 2 cm apart-—a parallel-plate capacitor—so that q = CV, where C = ε0 (0.01 m2/0.02 m). How much charge must be transferred from one plate to the other to produce a potential difference of 2 V? (b) Approximately what fraction would this be of the 1 total number of conduction electrons in a 100 g piece of copper, which has one conduction electron per atom?
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