An alternating flux is produced in the xx by the AC primary current. Mi – Xx Principle. The main arrondissement of operation of a xx is mutual arrondissement between two pas which is linked by a xx magnetic flux. An alternating flux is produced in the core by the AC primary amie. The main si of voyage of a pas is mutual xx between two pas which is linked by a mi magnetic flux. Operating & Voyage Principle of a Pas. The amie is based on two pas: first, that an electric current can arrondissement a magnetic xx (xx), and, xx that a changing ne field within a arrondissement of pas induces a voltage across the ends of .