magnetic flux (symbol Φ) Measure in webers
(Wb) of the strength and extent of a
magnetic field. The flux through an area A at right angles to a uniform magnetic field is Φ = μ
HA, where μ is the magnetic permeability of the medium and
H is the magnetic field intensity. Magnetic flux density, which is measured in
teslas (T), is the flux per unit area (symbol
B), which equals μ
H. Change of magnetic flux through a circuit induces an
electromotive force.