20.5.3—The concept of magnetic flux linkage

Flux linkage is NΦ for a coil of N turns when each turn links the same flux; it measures the total linked flux that can induce emf.

Changing turns, field, area or orientation can change linkage. Distinguish flux through one turn from linkage of the whole coil.

A 100-turn coil with 2 mWb per turn has flux linkage 0.20 Wb-turn.

NΦ is not magnetic flux in one turn and does not have the same physical unit interpretation as Φ alone.