| 单词 | Henry, Joseph |
| 释义 | Henry, Joseph (1797–1878) US physicist, who became professor of natural philosophy at Princeton in 1832. In 1829 he made an electric motor, and used insulated windings to produce a powerful electromagnet. A year later he discovered electromagnetic induction (independently of Faraday), and in 1832 he discovered self-induction (see inductance). In 1835 he invented the electric relay |
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