Solenoid

A solenoid is a loop of wire, often wrapped around a metallic core, which produces a magnetic field through electromagnetic induction when an electrical current is passed through it. Solenoids are important because they can create controlled magnetic fields and can be used as electromagnets.

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In engineering, the term solenoid may also refer to some transducer devices that convert energy into linear momentum. Three common types of solenoids are electromechanical solenoids, which harness electrical energy; pneumatic solenoids, which derive their energy from compressed air and hydraulic solenoids, which obtain energy from pressurized fluids.

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Metallic: REDIRECT Metal...

Magnetic field: :For other senses of this term, see magnetic field (disambiguation)....

Electromagnetic induction: Electromagnetic induction is the production of an electrical potential difference (or voltage) across a conductor situated in a changing magnetic flux....