来自江云波的问题
（1）根据图1中所示的电路图连接图2中的实物图，要求导线不能交叉，元件要与电路图对应．（2）现有一盏可以调节亮度的台灯，请将该台灯的电路图画在图3的方框内．
（1）根据图1中所示的电路图连接图2中的实物图，要求导线不能交叉，元件要与电路图对应．
（2）现有一盏可以调节亮度的台灯，请将该台灯的电路图画在图3的方框内．
1回答
2020-12-08 19:40
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唐峥
（1）采用“电流流向法”，电流从电源负极出发，依次串联开关S1、灯泡L1串联起来，再将S2、灯泡L1分别并联在灯泡L1的两端即可，如下图所示：
（2）用一电阻器与台灯的灯泡串联，通过改变电阻器的阻值，从而改变串联电路的总阻值，在电压不变的情况下，电路的电流就不断变化，台灯的灯泡消耗的电功率不断变化，其亮度不断变化．如图所示：
2020-12-08 19:43:11
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