**Definition of Leakage Inductance**

The magnetic flux linked to both the primary winding and the secondary winding is said to be the main flux, (φ_{12} or φ_{21}). The magnetic flux which interlinks only with the primary winding, and does not interlink with the secondary winding, is said to be the primary leakage flux, φ_{σ1}. The magnetic flux which interlinks with the secondary winding, and does not interlink with the primary winding is said to be the secondary leakage flux, φ_{σ2}. The primary side leakage flux becomes the primary side leakage inductance, and the secondary side leakage flux becomes the secondary side leakage inductance. Defining k to be the coupling coefficient, and denoting the leakage inductances of the primary side and the secondary side as L_{e1} and L_{e2} respectively, it follows that:

If one winding of a transformer which has two windings is short-circuited, the inductance measured from the other winding is the leakage inductance. It is also called short-circuited inductance. Denoting the leakage inductances of the primary and secondary sides as L_{sc1} and L_{sc2} respectively, it follows that:

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“The very *definition* of the real becomes: that of which it is possible to give an equivalent reproduction.... The real is not only what can be reproduced, but that which is always already reproduced. The hyperreal.”

—Jean Baudrillard (b. 1929)