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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