Magnetic Flux
The measure of the total magnetic field passing normally through a specified surface area.
Governing formula
Φ_B = ∫ B · dA = |B| |A| cos θ
SI unit
Wb (Webers = T·m²)
In depth
Magnetic flux quantifies the total number of magnetic field lines passing through a surface. A time-varying magnetic flux induces an electromotive force according to Faraday's law of induction.
Examples in the real world
A 1 Tesla magnetic field oriented perpendicular to a 2 m² surface area wire loop producing 2 Webers of magnetic flux.