Magneettiflussin
Magneettiflussin, or magnetic flux, is a measure of the amount of magnetic field passing through a given surface. It is denoted by the symbol ΦB and is defined as the surface integral of the magnetic field B over a surface S: ΦB = ∫S B · dA. When the field is uniform and the surface is flat with area A and angle θ between B and the surface normal, ΦB = B A cos θ. The flux is measured in webers (Wb), where 1 Wb = 1 V·s = 1 T·m².
The flux depends on the local magnetic field and the orientation and size of the surface. The
Magnetic flux is closely related to magnetic flux density B, the local field. When B and the
In coils with N turns, the flux linkage is Ψ = NΦB, and inductance L is defined by Ψ