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我们日常生活中接触到很多小型电动机,如儿童电动玩具、剃须刀具等都有小型电动机,只要稍加注意就能够收集一些,配合各种电池,可用来做多种物理演示实验。1 演示“视觉暂留”现象用硬塑料板或硬纸板做一个直径为2 0cm的圆盘,在圆盘的中心钻一个跟电机转轴大小相同的小孔,把圆
In our daily life, we are exposed to a lot of small motors, such as children’s electric toys, shaving tools, etc. There are small motors that can be collected with a little attention, and with a variety of batteries, can be used for a variety of physical demonstration experiments. 1 Demonstrate the “permanent persistence” phenomenon. Use a hard plastic plate or cardboard to make a disc with a diameter of 20cm. Drill a hole with the same size as the shaft of the motor in the center of the disc.