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electromagnet    音標拼音: [ɪl,ɛktrom'ægnət]
n. 電磁石

電磁石

electromagnet
電磯( 起重機 )

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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英文字典中文字典相關資料:
  • Electromagnet - Wikipedia
    An electromagnet is a type of magnet in which the magnetic field is produced by an electric current Electromagnets usually consist of wire (likely copper) wound into a coil A current through the wire creates a magnetic field which is concentrated along the center of the coil
  • 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
  • Electromagnets - AQA What is an electromagnet? - BBC
    Electromagnets are used in devices such as electric bells, and door locks that can be controlled remotely Learn about and revise electromagnetism, the motor effect and its applications in
  • Electromagnets How They Work | Dings Electromagnetic Separators
    What is an Electromagnet and How do they Work? Electromagnets are a type of magnet and one we use in many of our magnetic separators Unlike permanent magnets, an electromagnet’s magnetic field is produced by an electrical current
  • 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
  • The Difference Between Electromagnets Permanent Magnets
    Electromagnets use electricity to generate magnetic flux As opposed to permanent magnets, electromagnets can have their magnetic output easily adjusted by varying the amount of electricity flowing through them and unlike those with fixed magnetic output
  • 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





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