问题
问答题
在如图电路中改动一处接线位置,使开关S只控制灯泡L2.要求:用笔画线代替导线,并在需改动的导线上画“×”.

答案
要使开关S只控制灯泡L2,只要把L1与开关连接的导线改接为与电源连接即可,如下图所示:
在如图电路中改动一处接线位置,使开关S只控制灯泡L2.要求:用笔画线代替导线,并在需改动的导线上画“×”.
要使开关S只控制灯泡L2,只要把L1与开关连接的导线改接为与电源连接即可,如下图所示:
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