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初中物理课本第二册在讲述用伏打电池给小灯泡供电一课中,课本中提到:“把一块铜片和一块锌片,浸在稀硫酸溶液里,就做成了一个伏打电池,它可以向小灯泡供电,使小灯泡发光。”而我在每次准备这个实验时,都感到这个实验比较难做。所以我对这个实验进行了一点小的改进,即用发光二极管代替灯泡,用二个伏打电池串联起来给发光二极管供电。改进后经任课教师在教学时试用,反映很好。
In the second volume of the junior middle school physics textbook, which teaches the use of a voltaic battery to power a small light bulb, the textbook states: “Put a piece of copper and a piece of zinc in a dilute sulfuric acid solution to make a voltaic battery. It can supply power to small bulbs and make small bulbs glow.” And every time I prepared this experiment, I felt that this experiment was harder to do. So I made a small improvement on this experiment, that is, using a light-emitting diode instead of a light bulb, and using two voltaic cells in series to power the light-emitting diodes. After the improvement, the teacher was tried during the teaching and reflected it well.