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电子表物美价廉,已经相当普及。由于其内部的CMOS数字集成电路和液晶显示屏耗电极微,显示灵敏度极高,将其用于学生课外活动实验,不但取材容易,便于学生自己课外操作,且实验效果十分理想,优于教材中传统实验方法。能大大激发学生学习兴趣,提高实验效果。现将电子表用于学生课外实验活动的几点做法介绍如下。具体方法:不论何种电子表,只要将其钮扣电池去掉,用小鳄鱼夹接出电源的“+”“-”极,即可用于课外活动实验。一、改善伏打电池供电效果: 初中物理第二册第七章第五节内容中,用伏打电池给小灯泡供电的实验,由于小灯泡耗电量大,伏打电池放电很快,发光好似“昙花一现”很快暗下来。课外活动时,我让学生用伏打电池带动电子表,只是把锌片
Electronic watches are cheap and affordable. Due to its internal CMOS digital integrated circuit and liquid crystal display electrode consumption micro, display sensitivity is extremely high, it is used in student extracurricular activity experiments, not only easy to draw, easy for students to their own extracurricular operations, and the experimental results are ideal, better than teaching materials Traditional experimental methods. Can greatly stimulate students’ interest in learning and improve experimental results. Some of the practices of using electronic watches for extracurricular experimental activities are described below. Specific methods: Regardless of the type of electronic watch, as long as the button battery is removed, and the “+” “-” pole of the power supply is connected with a small alligator clip, it can be used for extracurricular activity experiments. First, improve the efficiency of Volta battery power supply: In the fifth chapter of the seventh chapter of junior high school physics, the experiment of using a voltaic battery to supply a small light bulb, because the small bulb consumes a large amount of power, the voltaic battery discharges quickly and emits light. It seems as if it has been a short-lived phenomenon. During my extracurricular activities, I asked students to use a voltaic battery to drive the electronic watch.