111敏感元件的应用及制作传感器实验 精讲精练-2022届高三物理一轮复习疑难突破微专题
111敏感元件的应用及制作传感器实验一.必备知识1.研究热敏电阻实验(1)按图连接好电路,将热敏电阻绝缘处理。(2)把多用电表置于“欧姆”挡,并选择适当的倍率测出烧杯中没有水时热敏电阻的阻值,并记下温度计的示数。(3)向烧杯中注入少量的冷水,使热敏电阻浸没在冷水中,记下温度计的示数和多用电表测量的热敏电阻的阻值。(4)将热水分几次注入烧杯中,测出不同温度下热敏电阻的阻值,并记录。(5)处理数据根据记录数据,把测量到的温度、电阻值填入表中,分析热敏电阻的特性。 次数待测量 123456温度(℃)电阻(Ω)在坐标系中,粗略画出热敏电阻的阻值随温度变化的图线,如图所示。根据实验数据和R-t图线,...
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