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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
magnet

Magnet \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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