Abstract
Tabletop models were created from common materials to demonstrate concepts in direct current electrical resistivity, self potential and electromagnetic geophysical methods. The models can be used as a laboratory exercise or as a classroom demonstration. Data profiles over the models are similar to those computed from equations and from field examples. The signals are generated with a function generator or battery and are measured with a digital multimeter. The experiment is greatly facilitated by using a multimeter that can be connected to the serial port of a computer. The tabletop models reinforce concepts learned in basic physics courses, introductory geology and geophysics courses, and in environmental engineering courses.
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