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Shielding a wire

  1. Nov 15, 2013 #1
    Hi,
    how can we reduce field at a point(of observation) 30mm from a 10 m long blank copper wire with return path somewhere at infinity carrying DC current by using a 1m long copper tube 1mm wall thickness and 30mm outer diameter?
     
  2. jcsd
  3. Nov 15, 2013 #2

    f95toli

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    Science Advisor
    Gold Member

    Which field?

    If you are talking about the E field, then the question is not well formulated since the return conductor is at infinity.
    w
    If you are talking about B-field, then you can't. Copper will absolutely no effect on a static B field.
     
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