File:Picture of a Solenoid.png - Wikimedia Commons

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File:Solenoid, air core, insulated, 20 turns, (shaded).svg - Wikipedia

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File:Barmagnet2.png - Wikimedia Commons

A metal-free photoactive nitrogen-doped carbon nanosolenoid with

File:Coil and solenoid.svg - Wikimedia Commons

File:Solenoid 2.png - Wikipedia

File:Solenoid-wing.png - Pinball Makers