电学是初中物理的重要知识点,也是中考必考内容之一.近年来一些新题型悄然出现,频频登场,联系实际应用性强,开放创新,灵活性大,重研究性,怎样解答,现举例说明如下,供同学们参考.联系实际,体现应用性例1 如图1所示,电冰箱门框上有一个通过冰箱门来控制的开关,当冰箱门打开时,与开关相连的弹簧伸长,开关闭合使冰箱内的照明灯发光;当冰箱 Electricity is an important knowledge point for junior high school physics, and it is also one of the contents of the exam. In recent years, some new questions have emerged quietly, frequently appeared on the stage, linked with practical applications, open innovation, flexibility, research, how to answer, For example, as follows, for the students to refer to. In connection with the actual application example 1 shown in Figure 1, the refrigerator door frame has a switch controlled by the refrigerator door, when the refrigerator door is opened, the spring connected to the switch is extended The switch is closed so that the lights in the refrigerator glow; when the refrigerator