在图2所示电路中,滑动变阻器R2上标有"10Ω 1A"字样,电源电压18伏保持不变.当电键S闭合后,滑动变阻器的滑片处于某一位置时,电压表,电流表的示数分别为12V和0.4A.求:1)电阻R1的值.2)电阻R1消
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 06:26:02
![在图2所示电路中,滑动变阻器R2上标有](/uploads/image/z/6987233-65-3.jpg?t=%E5%9C%A8%E5%9B%BE2%E6%89%80%E7%A4%BA%E7%94%B5%E8%B7%AF%E4%B8%AD%2C%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8R2%E4%B8%8A%E6%A0%87%E6%9C%89%2210%CE%A9+1A%22%E5%AD%97%E6%A0%B7%2C%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B18%E4%BC%8F%E4%BF%9D%E6%8C%81%E4%B8%8D%E5%8F%98.%E5%BD%93%E7%94%B5%E9%94%AES%E9%97%AD%E5%90%88%E5%90%8E%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%A4%84%E4%BA%8E%E6%9F%90%E4%B8%80%E4%BD%8D%E7%BD%AE%E6%97%B6%2C%E7%94%B5%E5%8E%8B%E8%A1%A8%2C%E7%94%B5%E6%B5%81%E8%A1%A8%E7%9A%84%E7%A4%BA%E6%95%B0%E5%88%86%E5%88%AB%E4%B8%BA12V%E5%92%8C0.4A.%E6%B1%82%EF%BC%9A1%EF%BC%89%E7%94%B5%E9%98%BBR1%E7%9A%84%E5%80%BC.2%EF%BC%89%E7%94%B5%E9%98%BBR1%E6%B6%88)
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