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Core in an electromagnet

  1. May 31, 2015 #1

    MMS

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    Hello everyone,

    I read somewhere that it is preferable to use insulated iron wires instead of a single iron core inside an electromagnet.
    Anybody has an idea on why is that and what difference does it make to use each?

    Thanks in advance.
     
  2. jcsd
  3. May 31, 2015 #2
    You want the core to become magnetized, but you do not want to induce Eddy currents in the metal of the core. Eddy currents are much smaller in a bundle or stack of small, insulated wires or plates than in a big chunk.
     
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