Editing Electromagnetic coil (section)

===Electromagnets===
{{main|Electromagnet}}
[[Image:Stator eines Universalmotor.JPG|thumb|[[Field coil]] electromagnet on the [[stator]] of an AC [[universal motor]]. ]]
[[File:Canon AF-10 Date old camera shutter driver coil..jpg|thumb|Canon AF-10 Date old camera shutter driver coil.]]
Electromagnets are coils that generate a [[magnetic field]] for some external use, often to exert a mechanical force on something.<ref name="google10">{{cite book|title=Newnes Dictionary of Electronics|author1=Amos, S.W.|author2=Amos, R.|date=2002|publisher=Elsevier Science|isbn=9780080524054|url=https://books.google.com/books?id=lROa-MpIrucC&pg=PA113|page=113|access-date=2017-01-07}}</ref> or remove existing background fields.<ref>{{cite journal | last1 = Hobson | first1 = P. J. |display-authors=et al | year = 2022 | title =  Bespoke magnetic field design for a magnetically shielded cold atom interferometer | journal = Sci. Rep. | volume = 12 | issue = 1 | pages = 10520 | doi= 10.1038/s41598-022-13979-4 | pmid = 35732872 | pmc = 9217970 | arxiv = 2110.04498 | bibcode = 2022NatSR..1210520H | s2cid = 238583775 }}</ref> A few specific types:
:*[[Solenoid]] - an electromagnet in the form of a straight hollow helix of wire
:*Motor and generator windings - iron core electromagnets on the [[rotor (electric)|rotor]] or [[stator]] of electric motors and generators which act on each other to either turn the shaft (motor) or generate an electric current (generator)
:**[[Field winding]] - an iron-core coil which generates a steady magnetic field to act on the armature winding.
:**[[Armature (electrical engineering)|Armature]] winding - an iron-core coil which is acted on by the magnetic field of the field winding to either create torque (motor) or induce a voltage to produce power (generator)
:*[[Helmholtz coil]], [[Maxwell coil]] - air-core coils which serve to cancel an external magnetic field
:*[[Degaussing]] coil - a coil used to demagnetize parts
:*[[Voice coil]] - a coil used in a moving-coil [[loudspeaker]], suspended between the poles of a magnet. When the [[audio signal]] is passed through the coil, it vibrates, moving the attached speaker cone to create sound waves. The reverse is used in a dynamic [[microphone]], where sound vibrations intercepted by something like a [[Diaphragm (acoustics)|diaphragm]] physically transfer to a voice coil immersed in a magnetic field, and the coil's terminal ends then provide an electric analog of those vibrations.