一道物理题,需要详细答案.如图,一灯上标明8V 4W的字样,滑动变阻器的最大阻值为34Ω,把它们串接在10V的电路中.求:(1)灯正常发光时,R2接入电路中的阻值为多少?(2)R2的滑片在B点时,灯的实
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![一道物理题,需要详细答案.如图,一灯上标明8V 4W的字样,滑动变阻器的最大阻值为34Ω,把它们串接在10V的电路中.求:(1)灯正常发光时,R2接入电路中的阻值为多少?(2)R2的滑片在B点时,灯的实](/uploads/image/z/4514560-16-0.jpg?t=%E4%B8%80%E9%81%93%E7%89%A9%E7%90%86%E9%A2%98%2C%E9%9C%80%E8%A6%81%E8%AF%A6%E7%BB%86%E7%AD%94%E6%A1%88.%E5%A6%82%E5%9B%BE%2C%E4%B8%80%E7%81%AF%E4%B8%8A%E6%A0%87%E6%98%8E8V+4W%E7%9A%84%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%BA34%CE%A9%2C%E6%8A%8A%E5%AE%83%E4%BB%AC%E4%B8%B2%E6%8E%A5%E5%9C%A810V%E7%9A%84%E7%94%B5%E8%B7%AF%E4%B8%AD.%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89%E7%81%AF%E6%AD%A3%E5%B8%B8%E5%8F%91%E5%85%89%E6%97%B6%2CR2%E6%8E%A5%E5%85%A5%E7%94%B5%E8%B7%AF%E4%B8%AD%E7%9A%84%E9%98%BB%E5%80%BC%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%EF%BC%882%EF%BC%89R2%E7%9A%84%E6%BB%91%E7%89%87%E5%9C%A8B%E7%82%B9%E6%97%B6%2C%E7%81%AF%E7%9A%84%E5%AE%9E)
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