In physics, the magnetomotive force (abbreviated mmf or MMF, symbol ) is a quantity appearing in the equation for the magnetic flux in a magnetic circuit, Hopkinson's law.[1] It is the property of certain substances or phenomena that give rise to magnetic fields:
where Φ is the magnetic flux and is the reluctance of the circuit. It can be seen that the magnetomotive force plays a role in this equation analogous to the voltage V in Ohm's law, V = IR, since it is the cause of magnetic flux in a magnetic circuit:[2]
where N is the number of turns in a coil and I is the electric current through the coil.
where Φ is the magnetic flux and is the magnetic reluctance
where H is the magnetizing force (the strength of the magnetizing field) and L is the mean length of a solenoid or the circumference of a toroid.
^Waygood, p. 137
^Smith, pp. 495–506
and 22 Related for: Magnetomotive force information
In physics, the magnetomotiveforce (abbreviated mmf or MMF, symbol F {\displaystyle {\mathcal {F}}} ) is a quantity appearing in the equation for the...
and magnetic recording heads. The relation between magnetic flux, magnetomotiveforce, and magnetic reluctance in an unsaturated magnetic circuit can be...
the analysis of magnetic circuits. It is defined as the ratio of magnetomotiveforce (mmf) to magnetic flux. It represents the opposition to magnetic...
electromagnetic fields. The electromagnetic force is one of the four fundamental forces of nature. It is the dominant force in the interactions of atoms and molecules...
proportional to both N and I, hence this product, NI, is given the name magnetomotiveforce. For an electromagnet with a single magnetic circuit, Ampere's Law...
in electromagnetism, the Lorentz force (or electromagnetic force) is the combination of electric and magnetic force on a point charge due to electromagnetic...
In electromagnetism and electronics, electromotive force (also electromotance, abbreviated emf, denoted E {\displaystyle {\mathcal {E}}} or ξ {\displaystyle...
circuit (or element within that circuit) dependent on sinusoidal magnetomotiveforce (SI Unit: At·Wb−1) and sinusoidal magnetic flux (SI Unit: T·m2),...
for electric circuits) and the definition of magnetomotiveforce (magnetic analogue of electromotive force): F = Φ B R = N I {\displaystyle {\mathcal {F}}=\Phi...
associated with a vector that determines what force a moving charge would experience at that point (see Lorentz force). Since a vector field is quite difficult...
or accelerates with respect to the synchronously rotating air gap magnetomotiveforce, creating relative motion. The equation describing the relative motion...
J. Hunt. The electromagnetic field exerts the following force (often called the Lorentz force) on charged particles: F = q E + q v × B {\displaystyle...
Synchronous Generators" the two reactions theory that divided the armature magnetomotiveforce (MMF) into two components: the direct axis component and the quadrature...
to have the same area. For the AlNiCo magnet we can calculate the magnetomotiveforce (MMF), the reluctance R {\displaystyle {\mathcal {R}}} and the magnetic...
immunosuppressant drug used to prevent rejection in organ transplantation Magnetomotiveforce Methoxymethylfurfural, an intermediate in the production of renewable...
Ampere-turn (symbol A t), an International System of Units (MKS) unit of magnetomotiveforce Attotesla (symbol aT), 10−18 tesla, an SI derived unit of magnetic...
build-up of electric charge (e.g., a capacitor), and from an electromotive force (e.g., electromagnetic induction in a generator). On a macroscopic scale...
electric field in itself cannot flow. The electric field E can exert a force on an electric charge at any point in space. The electric field is the gradient...
F=\int \mathbf {H} \cdot \mathrm {d} {\boldsymbol {\ell }}} is the magnetomotiveforce applied to the circuit, and Rm is the reluctance of the circuit....
invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel...
M F R {\displaystyle \Psi =n{\frac {MMF}{R}}} , where MMF is the magnetomotiveforce and R is the total reluctance of the coil. Since M M F = n I {\displaystyle...
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