Magnetic reluctance, or magnetic resistance, is analogous to resistance in an electrical circuit (although it does not dissipate magnetic energy). In likeness to the way an electric field causes an electric current to follow the path of least resistance, a magnetic field causes magnetic flux to follow the path of least magnetic reluctance. The reluctance of a magnetically uniform magnetic circuit element can be calculated by the length and cross section area of the element.

Related formulas


RReluctance (H-1)
lThe length of the element (m)
μThe permeability of the material (H/m)
AThe cross section area (m2)