现在让我们一起来做一些科学小实验好吗?实验一:一个实验改变世界面貌这就是1820年由丹麦科学家欧斯塔德做过的实验。这个实验引出了后来电磁的全部应用,从发电机和发动机到电报、电话和整个电的现代技术。实验准备:简易电池、一碗水、一片软木、一根磁针。 Now let us work together to do some small scientific experiments Almost one experiment: one experiment to change the face of the world This is the 1820 experiment by Danish scientist Ostad. This experiment led to the subsequent full application of electromagnetism, from generators and engines to telegrams, telephones and the entire electric modern technology. Experimental preparation: Simple battery, a bowl of water, a piece of cork, a magnetic needle.