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In discussing electric currents, we developed a model of how currents in electric circuits work.   In this model, matter was made up of two kinds of opposite charges, one light and moveable and one heavy and stationary. We also created a number of analogies to help us think about what happens. Pick one of these.

• Give an example of how the analogy you chose helps us think about electric currents.
• Give an example of a place where your chosen analogy leads us astray in thinking about electric currents.

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Page last modified February 29, 2008: E49