如图所示电路中,小灯泡L上标有“8V 3.2W”字样,滑动变阻器的最大阻值为40欧,Rl的阻值为18欧.求:(1) 小灯泡L的电阻.(2) S、Sl、S2均闭合时,电压表的示数为9伏,求电源电压及电阻R1上消耗的
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![如图所示电路中,小灯泡L上标有“8V 3.2W”字样,滑动变阻器的最大阻值为40欧,Rl的阻值为18欧.求:(1) 小灯泡L的电阻.(2) S、Sl、S2均闭合时,电压表的示数为9伏,求电源电压及电阻R1上消耗的](/uploads/image/z/4592819-11-9.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%94%B5%E8%B7%AF%E4%B8%AD%2C%E5%B0%8F%E7%81%AF%E6%B3%A1L%E4%B8%8A%E6%A0%87%E6%9C%89%E2%80%9C8V+3.2W%E2%80%9D%E5%AD%97%E6%A0%B7%2C%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8%E7%9A%84%E6%9C%80%E5%A4%A7%E9%98%BB%E5%80%BC%E4%B8%BA40%E6%AC%A7%2CRl%E7%9A%84%E9%98%BB%E5%80%BC%E4%B8%BA18%E6%AC%A7.%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89+%E5%B0%8F%E7%81%AF%E6%B3%A1L%E7%9A%84%E7%94%B5%E9%98%BB.%EF%BC%882%EF%BC%89+S%E3%80%81Sl%E3%80%81S2%E5%9D%87%E9%97%AD%E5%90%88%E6%97%B6%2C%E7%94%B5%E5%8E%8B%E8%A1%A8%E7%9A%84%E7%A4%BA%E6%95%B0%E4%B8%BA9%E4%BC%8F%2C%E6%B1%82%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E5%8F%8A%E7%94%B5%E9%98%BBR1%E4%B8%8A%E6%B6%88%E8%80%97%E7%9A%84)
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