今天，我的尺子带电了，这是怎么回事呢？你想知道吗？请你往下看。
作文课上，老师拿出一张正方形的白纸，有4张小卡片合起来那么大摸起来很柔软。只见老师双手捏住纸撕出一个小口子，把它慢慢地撕开来，很快成了两半。他一次一次地重复撕，把它撕成小片，发给我们。我捏住纸的两角再撕。一次次地撕开来，撕得很小很小，有的像小蚂蚁，有的像小蚯蚓，还有的一簇簇像肉松，真有趣。等我们都撕好了，老师教我们做“摩擦起电”的实验。我拿出尺子，首先拿尺子飞快地贴在头皮上摩擦，麻麻的，都快把头皮磨破了。我再把尺子放在纸片堆里。忽然，纸屑像一个个木偶一样跟着我的尺子跳动起来，像在演戏，又像是一位舞蹈家在舞台上翩翩起舞，还像一个个活泼可爱的孩子跳来又跳去。纸片有些像是玩累了落到了地上，有的像跟尺子有了一段感情似的，紧紧地和尺子粘在一起了。
正当我感到奇怪时，老师解释说：“这是因为摩擦时，尺子带着静电，所以可以吸起纸片来。”
“噢!原来是这样啊!”我恍然大悟。
你看，我的尺子不就带电了吗？静电多么神奇啊!
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