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How many turns in my electromagnet?

  1. Jun 14, 2012 #1

    I am making a DIY electromagnet.

    I'm using 2 9v D Cell Batteries as the power source and a 15mm diameter iron core.

    I am looking to make the magnet as powerful as possible.

    My questions are as follows:

    1. Should I connect the batteries in series or parallel?
    2. What gauge wire should I use? I know that thicker gauge wire offers less resistance so is it better to go with thicker wire?
    3. I guess the main question is thicker wire and less turns or thinner wire and more turns?
    4. Also for the given gauge how many turns do i need and at what point would the magnet become saturated?

    I know i must seem like I don't know much and it's completely true. :confused: I have been scouring the web and am unable to find a simple enough answer. I would be the first to admit my maths isn't the greatest so some of the answers I have already found have flown right over my head.

    Any help you guys could offer would be greatly appreciated.

    Many Thanks,

  2. jcsd
  3. Jun 14, 2012 #2
    Google 3 volt electromagnet.

    9 volt batteries should not be used.

    1 1/2 volt D cells may be used. Probably parallel would be best.

    Very small wire is usually best.
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