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一次电学实验中，小明选择一个正常发光时电压为“2.5V”的小灯泡连接了如图所示的电路．实验中电源电压保持6V不变，测量结果如下表．（1）灯泡正常发光时的电阻为 Ω；（2）实验室有三种规格的滑动变...
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教案备课库《九年级（物理）学科寒假自主学习试卷（八）》真题及答案
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