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Coaxial cables and displacement current

  1. Nov 10, 2012 #1
    Hi All,

    Consider a situation in which a coaxial cable have electric current i(t) = Imax * cos(w*t) flowing through its cilindrical inner cylindrical core (with radius a) and the inverse current flowing on its surface cover (with radius b).
    I would like to know if it is correct to say that, outside de cable (r > b), we will see not only zero current effects (due to obvious cancelation) but also zero displacement current effects.

    I hope my explanation could have achieved the necessary clarity.

    Best wishes,

  2. jcsd
  3. Nov 11, 2012 #2
    By "effects"in the OP I mean effects in the magnetic field B generated by the cable. In other word my question is:
    with current i varying in time, the magnetic field produced by the cable outside it is zero?
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