In physics, the magnetomotive force (abbreviated mmf or MMF, symbol F {\displaystyle {\mathcal {F}}} ) is a quantity appearing in the equation for the magnetic flux in a magnetic circuit, Hopkinson's law. It is the property of certain substances or phenomena that give rise to magnetic fields: F = Φ R , {\displaystyle {\mathcal {F}}=\Phi {\mathcal {R}},} where Φ is the magnetic flux and R {\displaystyle {\mathcal {R}}} is the reluctance of the circuit.
In physics, the magnetomotive force (abbreviated mmf or MMF, symbol F {\displaystyle {\mathcal {F}}} ) is a quantity appearing in the equation for the magnetic flux in a magnetic circuit, Hopkinson's law. It is the property of certain substances or phenomena that give rise to magnetic fields: F = Φ R , {\displaystyle {\mathcal {F}}=\Phi {\mathcal {R}},} where Φ is the magnetic flux and R {\displaystyle {\mathcal {R}}} is the reluctance of the circuit.
Source: Wikipedia "Magnetomotive force" · CC BY-SA 4.0
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