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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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  • Electromagnet | Uses, Properties Applications | Britannica
    electromagnet, device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core An electromagnet is used wherever controllable magnets are required, as in contrivances in which the magnetic flux is to be varied, reversed, or switched on and off
  • How Electromagnets Work - HowStuffWorks
    An electromagnet results when electrical currents flow around some ferromagnetic core The Earth's core is iron, and we know it has a north pole and a south pole These aren't just geographical designations but actual opposing magnetic poles
  • What is Electromagnet? - BYJUS
    What is an electromagnet and how does it work? A magnet that consists of a piece of iron or steel surrounded by a coil is known as an electromagnet The metal becomes magnetic when an electric current is passed through the coil
  • Electromagnet – Electricity – Magnetism
    An electromagnet is a type of magnet that generates a magnetic field when an electric current is applied to it Unlike permanent magnets, electromagnets can be turned on and off by controlling the flow of electric current
  • The Electromagnet, Magnetic Coil and Permeability
    The electromagnet is a type of temporary magnet in which its magnetic field is produced by electric current and to concentrate the magnetic field, the wire of an electromagnet is wound into a coil
  • What is An Electromagnet?-Definition, Types, And Applications - Eduinput
    An electromagnet works differently than a permanent magnet They’re made of coils of wire that carry an electric current This current creates magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, they behave like a magnet
  • Simple Explanation Of Electromagnets - Sciencing
    Electromagnets use electricity to create a magnetic field Electromagnets are important parts both of electric motors and electricity generators The strength of the magnetic field created by an electromagnet can vary from fairly weak to very strong
  • The Basics of Electromagnets: How They Work and Why They’re Important
    What is an Electromagnet? Simply put, an electromagnet is a type of magnet that is created using electricity Unlike permanent magnets, which have a fixed magnetic field, electromagnets can be turned on and off by controlling the flow of electricity through them
  • Electromagnets - Definition, Preparation and Working - Vedantu
    A magnet that is created by using the electric current created by electricity is known as the electromagnet Similarly, an electromagnet can be turned on or off to electricity Accordingly, its strength can be increased or decreased by strengthening or diminishing the current
  • Electromagnet | Definition, Parts Uses - Lesson | Study. com
    An electromagnet consists of coils of wire wrapped around an iron core or other ferromagnetic material and a power source It becomes a magnet only when current





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