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丹麦物理学家奥斯特经过30余年的探索,终于1820年发现了电流的磁效应,从而推翻了人们长期关于电现象与磁现象是彼此孤立、相互无关的传统观念。自此,不少人开始从事于它的逆转化问题的研究。1821年英国物理学家法拉第曾在日记中写到:“电可转化为磁,磁也能转变为电!”1831年他终于实现了“把磁转化为电”的诺言,并称之为“电磁感应”。
After more than 30 years of exploration, Danish physicist Auster finally discovered the magnetic effect of currents in 1820, thus overthrowing the long-standing tradition that electrical and magnetic phenomena are isolated and unrelated to each other. Since then, many people have begun to engage in the study of its reverse transformation problem. In 1821, the English physicist Faraday wrote in his diary: “Electricity can be transformed into magnetic, and magnetic can also be transformed into electricity!” In 1831 he finally realized his promise of “converting magnetism into electricity” and called it “ Electromagnetic induction”.