(2)(3)要过程和公式小明用如图所示的电路,探究电源暗箱(图中虚线框所示)中电阻R0的阻值.(1)开关闭合前,滑动变阻器的滑片应置于 端(选填“a”或“b”);(2)当电压表的示数为10V的时候,
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![(2)(3)要过程和公式小明用如图所示的电路,探究电源暗箱(图中虚线框所示)中电阻R0的阻值.(1)开关闭合前,滑动变阻器的滑片应置于 端(选填“a”或“b”);(2)当电压表的示数为10V的时候,](/uploads/image/z/725004-36-4.jpg?t=%EF%BC%882%EF%BC%89%EF%BC%883%EF%BC%89%E8%A6%81%E8%BF%87%E7%A8%8B%E5%92%8C%E5%85%AC%E5%BC%8F%E5%B0%8F%E6%98%8E%E7%94%A8%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%9A%84%E7%94%B5%E8%B7%AF%2C%E6%8E%A2%E7%A9%B6%E7%94%B5%E6%BA%90%E6%9A%97%E7%AE%B1%28%E5%9B%BE%E4%B8%AD%E8%99%9A%E7%BA%BF%E6%A1%86%E6%89%80%E7%A4%BA%29%E4%B8%AD%E7%94%B5%E9%98%BBR0%E7%9A%84%E9%98%BB%E5%80%BC.%281%29%E5%BC%80%E5%85%B3%E9%97%AD%E5%90%88%E5%89%8D%2C%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8%E7%9A%84%E6%BB%91%E7%89%87%E5%BA%94%E7%BD%AE%E4%BA%8E+%E7%AB%AF%28%E9%80%89%E5%A1%AB%E2%80%9Ca%E2%80%9D%E6%88%96%E2%80%9Cb%E2%80%9D%29%EF%BC%9B%282%29%E5%BD%93%E7%94%B5%E5%8E%8B%E8%A1%A8%E7%9A%84%E7%A4%BA%E6%95%B0%E4%B8%BA10V%E7%9A%84%E6%97%B6%E5%80%99%2C)
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