The mental models people use to think about the nature of electric current were investigated. Interviews, based on sequences of prediction-observation-explanation, were conducted with Brazilian secondary students, technical school students, teachers, engineers and practitioners who deal with electricity as part of their daily activities. Four models are reported, showing a possible pattern of progression which may be related to individual's acquisition of conceptual knowledge about electricity.
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Borges et al. (1999) studied this question.
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