Magnetic voltage, v m , is an alternate name for magnetomotive force (mmf), F (SI unit : A or amp-turn), which is analogous to electrical voltage in an electric circuit. Not all authors use the term magnetic voltage. The magnetomotive force applied to an element between point A and point B is equal to the line integral through the component of the magnetic field strength, H . v m = F = − − ∫ ∫ A B H ⋅ ⋅ d l The resistance–reluctance model uses the same equivalence between magnetic voltage and magnetomotive force.