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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 - Wikipedia
    An electromagnet is a type of magnet in which the magnetic field is produced by an electric current Electromagnets usually consist of copper wire wound into a coil
  • Electromagnet | Uses, Properties Applications | Britannica
    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
  • What Is an Electromagnet? Definition, Working, and Uses Explained
    An electromagnet is a temporary magnet created by passing an electric current through a wire Learn how electromagnets work, their applications, and how to make one easily
  • Electromagnet - GeeksforGeeks
    An electromagnet is a magnet powered by electricity, creating a magnetic field that can be controlled It works by passing an electric current through a coil of wire
  • 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
  • What is Electromagnet? - BYJUS
    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
  • Electromagnets: Principles, Types and Uses Explained - Vedantu
    An electromagnet is a type of magnet created when electric current flows through a coil of wire wrapped around a soft iron core The flow of current produces a magnetic field, making the core magnetic
  • Electromagnets – The Wonders of Physics – UW–Madison
    An electromagnet is a magnet made with electricity Normal magnets are called permanent magnets An electromagnet has the same properties as an ordinary magnet It has a north and south pole and it attracts steel and iron It is different from a permanent magnet because it can be turned on and off
  • Electromagnetism - Wikipedia
    In physics, electromagnetism is an interaction that occurs between particles with electric charge via electromagnetic fields The electromagnetic force is one of the four fundamental forces of nature [1] It is the dominant force in the interactions of atoms and molecules Electromagnetism can be thought of as a combination of electrostatics and magnetism, which are distinct but closely





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