Definition of electromagnet
: a core of magnetic material (such as iron) surrounded by a coil of wire through which an electric current is passed to magnetize the core
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Recent Examples of electromagnet from the Web
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Instead of explosives, railguns use powerful electromagnets to fire projectiles as far as 100 nautical miles (115 miles) at seven times the speed of sound.
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The devices use an electromagnet to excite a phosphor coating, which creates visible light.
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The power brick also seems to hum when the electromagnets activate, which is not comforting — and surprisingly not an issue unique to this floating product, either.
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These tiny bots are controlled by precise magnetic fields generated by an array of electromagnets.
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So the reaction must be contained inside a intense magnetic field generated by electromagnets.
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That turns them into an electromagnet, generating a magnetic field which pushes against an existing field generated by a second set of permanent magnets inside the stator.
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An ordinary doorbell closes a circuit that activates an electromagnet, which moves a piston to sound a bell.
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Resistive magnets are a type of electromagnet used for research.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'electromagnet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of electromagnet
1821
ELECTROMAGNET Defined for English Language Learners
Definition of electromagnet for English Language Learners
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: a piece of metal that becomes magnetic when an electric current is passed through or near it
ELECTROMAGNET Defined for Kids
Definition of electromagnet for Students
: a piece of iron encircled by a coil of wire through which an electric current is passed to magnetize the iron
Medical Dictionary
Learn More about electromagnet
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Spanish Central: Translation of electromagnet Nglish: Translation of electromagnet for Spanish speakers Britannica.com: Encyclopedia article about electromagnet
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