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Insulated vs uninsulated wire in electromagnet

  1. Oct 24, 2013 #1

    My first post at Physics Forums!

    Nice to meet you!

    In an electromagnet, where the coil windings are not touching themselves (the coil is not touching itself), is there any difference on the magnet strength created depending on whether the wire is insulated or not (bare wire)? If the coil windings were touching I would understand that the current would just short cut kind of in a straight line over the coil but in this case they are not. It will be only a few windings and they are not touching (a relatively weak magnet). But would it make a difference in this case if the wire was bare or insulated?

    Added comment: it is insulation between the core (iron) and the coil itself.

  2. jcsd
  3. Oct 24, 2013 #2
    I can't see why unless the insulator has some weird magnetic properties. If you were talking about insulated windings within the coil and a high voltage you can get parasitic capacitance where some impedance is produced from the dielectric response of the insulator in between windings at different potentials. Between the coil and the magnets ? Doubt it.
  4. Oct 24, 2013 #3
    It's low voltage, like 1.5 V. Not much more than 200 V at least.
    Thanks for answer! I too would believe it has no noticeable difference, although I am not too sure.

    In case others know of any difference it would be interesting to hear.
  5. Oct 28, 2013 #4
    The insulation would act as thermal insulation as well as electrical insulation. If you use bare wire it will reject more heat and allow you to use higher current, which would allow you to make a stronger field. Not sure how relevant that would be to your application.
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