1.如图所示,滑动变阻器上标有20欧,1A的字样,电源电压为6V,求:(1)当开关S1、S3闭合,S2断开,滑动变阻器R1滑片滑到最右端时,电流表示数为0.5A,则电阻R2的阻值为多少?(2)若用电压表换接在S1
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![1.如图所示,滑动变阻器上标有20欧,1A的字样,电源电压为6V,求:(1)当开关S1、S3闭合,S2断开,滑动变阻器R1滑片滑到最右端时,电流表示数为0.5A,则电阻R2的阻值为多少?(2)若用电压表换接在S1](/uploads/image/z/5105718-54-8.jpg?t=1.%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8%E4%B8%8A%E6%A0%87%E6%9C%8920%E6%AC%A7%2C1A%E7%9A%84%E5%AD%97%E6%A0%B7%2C%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E4%B8%BA6V%2C%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89%E5%BD%93%E5%BC%80%E5%85%B3S1%E3%80%81S3%E9%97%AD%E5%90%88%2CS2%E6%96%AD%E5%BC%80%2C%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8R1%E6%BB%91%E7%89%87%E6%BB%91%E5%88%B0%E6%9C%80%E5%8F%B3%E7%AB%AF%E6%97%B6%2C%E7%94%B5%E6%B5%81%E8%A1%A8%E7%A4%BA%E6%95%B0%E4%B8%BA0.5A%2C%E5%88%99%E7%94%B5%E9%98%BBR2%E7%9A%84%E9%98%BB%E5%80%BC%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%EF%BC%882%EF%BC%89%E8%8B%A5%E7%94%A8%E7%94%B5%E5%8E%8B%E8%A1%A8%E6%8D%A2%E6%8E%A5%E5%9C%A8S1)
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