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在初中生的头脑中,对电流的理解总是有一点点疑惑,总是想从自己的生活经验中寻找一种模型来类比电流,从而就产生了一些错误模式,甚至一些教师头脑中也有一些错误的模型。下面介绍几种常见的错误模型,并通过小实验进行验证。1.单极模式有学生认为只有一根导线起作用,电流从电池一端通过一根电线,流过电灯那儿,点亮了电灯,同时消耗掉流过来的电。这就像家里的煤气炉一样,打开开关,火就会燃烧起来,把流过来的煤
In the minds of junior high school students, there is always a little doubt as to the understanding of current, and always want to find a model from the experience of their own life to analogize the current, resulting in some wrong patterns. Some teachers even have some minds Wrong model. Here are a few common error models that are validated through small experiments. 1. Unipolar mode Some students think that only one wire works. The current flows from one end of the battery through one wire and through the lamp, turning on the lamp and dissipating the electricity flowing from it. It’s like the gas stove in your home. When you turn on the switch, the fire will burn and turn the coal flowing over