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夏天,人们喝过饮料后的发旧易拉罐随处可见。笔者用这些质轻华丽的小金属圆筒做了几件小仪器用于物理教学,效果不错,现介绍如下: 一、制作楞次定律演示器取一废易拉罐,用剪刀在筒上拦腰截出两个约2厘米宽的圆环。将其中一个圆环剪开并截去一小段使之
In summer, old cans are found everywhere people drink. I used these lightweight and gorgeous small metal cylinders to make several small instruments for physics teaching. The results are as follows: 1. Make a Lenz’s law demonstrator. Take a waste can, and use a pair of scissors to cut it off on the tube. Two rings about 2 centimeters wide. Cut one of the rings and cut it off for a short while