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1 影响实验效果的主要因素是什么? 在摩擦起电实验中,一般都把天气是否干燥和实验器材是否干净作为影响实验效果的两个因素,并认为前者是主要的,不少资料中还介绍了干燥的方法。笔者工作在湖南,每年六月份做这个实验,正处典型的南方潮湿天气,在近20年的教学实践中,从未发生过摩擦起电没做成功的现象。一次在教育实习中,学校只有一块很脏的锦旗,原任课教师说从未做成功,建议实习老师不做,但经洗净锦旗和玻璃棒后,实验效果很好,上述可以说明,天气潮湿不一定是主要因素,实验器材是否干净是很重要的。
1 What are the main factors that affect the experimental results? In the friction electrification experiment, the weather is generally considered to be the two factors affecting the experimental results, whether the weather is dry or not, and the former is considered to be the main one. Many data are also introduced. The dry method. The author works in Hunan. In June this year, this experiment is being performed in a typical southern wet weather. In the past 20 years of teaching practice, there has never been a phenomenon of friction and electrification without success. In an education practice, the school only had a very dirty pennant. The original teacher said that he had never succeeded and suggested that the teacher did not do it. However, after cleaning the pennant and the glass rod, the experiment worked well. The above shows that the weather is damp. It is not necessarily the main factor. It is important that the laboratory equipment is clean.