= Solenoid
{wiki}
<Solenoids> are a type of <electromagnet coil> of #helical shape.
Solenoid means "tubular" in <Greek (language)>.
Solenoids are simpler to build as they don't require <#insulated wire> as in modern <electrical cable> because as the <electromagnetic coils> don't touch one another.
As such it is perhaps the reason why some early electromagnetism experiments were carried out with solenoids, which <#André-Marie Ampère> named in 1823.
But the downside of this is that the <magnetic field> they can generate is less strong.
\Image[https://en.wikipedia.org/wiki/File:Solenoid-1.png]
{title=Illustration of a <solenoid>}
\Image[https://en.wikipedia.org/wiki/File:VFPt_Solenoid_correct2.svg]
{title=<Magnetic field> lines around a <solenoid> cross-section}
{description=TODO accurate simulation or not?}
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