Teaching Physics with the Physics Suite
Edward F. Redish
In this problem, you will consider a number of different electric circuits and try to make sense of them using a couple of different analogies. The goal is to see if these analogies are useful for you.
The "air pressure" analogy - An electric circuit is like air flowing through a tube. The air is like movable charge, the flow of the air is like current, and the pressure in the air is like voltage.
The "loop of rope" analogy - An electric circuit is like a loop of rope going through a number of metal rings (or through pulleys or people's hands). The rope is like movable charge, its movement is like current, the rings (or pulleys or hands) are like bulbs, and tension in the rope is like voltage.
(a) (b) (c)
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Page last modified February 23, 2006: E33