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, DaTario
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?