中学校理科における電気抵抗の形状依存性の導入に向けての検討―抵抗体の形状を２次元的に変化させた電気抵抗値の測定実験の評価から―

抄録

In this study, we clarified the learning effect of introducing the shape dependence of electrical resistance from quantitative analysis, based on practice, in lower secondary school science. The experiment using CNP (carbon nanotube paper) resistors allows for a study of the shape dependence of electrical resistance with the resistor adjusting its shape two-dimensionally. The inferences obtained from the results of the questionnaire survey are as follows: (1) it is effective in understanding the combined resistance of the parallel connection but not the series connection; (2) when studying the shape dependence of electrical resistance, the learning effect of the combined resistance is higher when using CNP resistors than when using cement resistors; (3) the effect of a different teacher cannot be confirmed. Introducing the shape dependence of resistance in lower secondary school science is effective in understanding combined resistance. Therefore, we emphasize the importance of discussion regarding the introduction and accumulation of such practices.