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Magnetic field strength effected by insulation of wire

  1. Feb 17, 2012 #1
    Hello,
    Suppose there are two conductors carrying currents. One of them is bare conductor and the other has insulation. Now magnetic field will be created around them due to the current flow through them. What will be the condition of magnetic field strength around them? They have same field intensity or intensity around bare conductor will be greater than insulated conductor? Please explain

    Thanks
     
    Last edited by a moderator: Feb 17, 2012
  2. jcsd
  3. Feb 17, 2012 #2

    berkeman

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    Staff: Mentor

    The insulation has no effect. Why would it?
     
  4. Feb 17, 2012 #3
    Thanks for your reply. I guess insulation materials having lesser magnetic permeability than air will bring some effect (though negligible) isn't it?
     
  5. Feb 17, 2012 #4

    berkeman

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    Staff: Mentor

    A material would need to be ferrous to affect the magnetic field. Neither air nor wire insulation is ferrous.
     
  6. Feb 17, 2012 #5
    The effect of the insulation is negligible. That is why you have shielded cable.
     
  7. Feb 18, 2012 #6
    hmmm
     
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