同学们,你们去过南京科技馆吗?你们玩过怒发冲冠吗?当你用手使劲摩擦铁球的时候,你的头发就会像刺猬的毛一样竖起来。这就是静电的作用。在日常生活中,静电无处不在。秋冬季节,当我们脱去身上的毛衣时,常常听到“噼噼啪啪”的声音,如果正好在黑暗中,有时甚至还能看到衣服上冒出点点火花。这是因为在脱衣时,化纤或毛质的布料相互摩擦,从而产生静电。那些“噼噼啪啪”的声音,就是静电引起的。如果静电 Classmates, have you been to Nanjing Science and Technology Museum? Have you played angry punch? When you rub the iron ball hard by hand, your hair will be like a hedgehog hair erected. This is the role of static electricity. In everyday life, static electricity is everywhere. In autumn and winter, when we take off the sweaters from our body, we often hear “pops,” and sometimes even in the dark we can see some sparkle on our clothes. This is because when undressing, chemical fibers or woolen cloths rub against one another to create static electricity. Those “噼 啪啪啪 ” sound, is caused by static electricity. If static electricity