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electromagnet 音标拼音: [ɪl ,ɛktrom'ægnət] n. 电磁石 电磁石 electromagnet电矶( 起重机 ) electromagnet n 1: a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnetMagnet \ Mag" net\ ( m[ a^] g" n[ e^] t), n. [ OE. magnete, OF. magnete, L. magnes, - etis, Gr. Magnh^ tis li` qos a magnet, metal that looked like silver, prop., Magnesian stone, fr. Gr. Magnhsi` a, a country in Thessaly. Cf. { Magnesia}, { Manganese}.] 1. The loadstone; a species of iron ore ( the ferrosoferric or magnetic ore, { Fe3O4}) which has the property of attracting iron and some of its ores, and, when freely suspended, of pointing to the poles; -- called also { natural magnet}. [ 1913 Webster] Dinocrates began to make the arched roof of the temple of Arsino[" e] all of magnet, or this loadstone. -- Holland. [ 1913 Webster] Two magnets, heaven and earth, allure to bliss, The larger loadstone that, the nearer this. -- Dryden. [ 1913 Webster] 2. ( Physics) A bar or mass of steel or iron to which the peculiar properties of the loadstone have been imparted; -- called, in distinction from the loadstone, an { artificial magnet}. [ 1913 Webster] Note: An artificial magnet, produced by the action of an electrical current, is called an { electro- magnet}. [ 1913 Webster] { Field magnet} ( Physics & Elec.), a magnet used for producing and maintaining a magnetic field; -- used especially of the stationary or exciting magnet of a dynamo or electromotor in distinction from that of the moving portion or armature. [ 1913 Webster] Magnetic
Electro- magnet \ E* lec` tro- mag" net\, n. A mass, usually of soft iron, but sometimes of some other magnetic metal, as nickel or cobalt, rendered temporarily magnetic by being placed within a coil of wire through which a current of electricity is passing. The metal is generally in the form of a bar, either straight, or bent into the shape of a horseshoe. [ 1913 Webster]
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