Capacitance

IMG_20130307_102401114 The AP class is making capacitors out of aluminum foil placed between the pages of books. We are hoping that the capacitance is proportional to area, inversely proportional to the distance between the plates, and we also hope to determine the dielectric constant of textbook paper.

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6 responses to “Capacitance

  1. Andy "SuperFly" Rundquist

    cool. I’ve done a lab like this but we’ve used plastic wrap instead of paper. i think it was because you can squeeze it quite thin.

    • The problem with the paper in the textbooks is that there is also air between the pages of the textbooks, and while you can squeeze the textbooks, that is not a particularly reproducible method. This lab is therefore a good one for uncertainty analysis.

  2. Rob Spencer

    What kind of values did these get or capacitance?

  3. It seems like it would be a great lab for modeling. The students should be able to make predictions about what happens when the number of pages increases – capacitance goes up or down, and by a factor of what? I am going to try this.

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