| scalar line integral of a magnetic vector potential A along a curve C:|
where dr is the vector line element
NOTE 1 – For a closed curve C, the linked flux is equal to the magnetic flux through any surface S bounded by the curve:
where B is the magnetic flux density and endA the vector surface element.
NOTE 2 – For a coil with N turns, the linked flux is approximately equal to NΦ where Φ is the magnetic flux through any surface bounded by one turn.