# Magnetic flux

**fluxfluxes definition of flux used in electromagnetism magnetic flux linkagemagnetic ('''B''')magnetic field fluxmagnetic field strengthrotating flux**

In physics, specifically electromagnetism, the magnetic flux (often denotedwikipedia

229 Related Articles

### Weber (unit)

**weberWbwebers**

The SI unit of magnetic flux is the weber (Wb) (in derived units: volt \cdot seconds), and the CGS unit is the maxwell.

In physics, the weber ( symbol: Wb) is the SI derived unit of magnetic flux.

### Magnetic field

**magnetic fieldsmagneticmagnetic flux density**

) through a surface is the surface integral of the normal component of the magnetic field flux density B passing through that surface.

(magnetic flux) is measured in webers (symbol: Wb) so that a flux density of 1 Wb/m 2 is 1 tesla.

### Maxwell (unit)

**maxwellMx**

The SI unit of magnetic flux is the weber (Wb) (in derived units: volt \cdot seconds), and the CGS unit is the maxwell.

The maxwell (symbol: Mx) is the CGS (centimetre-gram-second) unit of magnetic flux (

### International System of Units

**SISI unitsSI unit**

The SI unit of magnetic flux is the weber (Wb) (in derived units: volt \cdot seconds), and the CGS unit is the maxwell.

### Tesla (unit)

**teslaTteslas**

:where B is the magnitude of the magnetic field (the magnetic flux density) having the unit of Wb/m 2 (tesla), S is the area of the surface, and θ is the angle between the magnetic field lines and the normal (perpendicular) to S.

The tesla (symbol: T) is a derived unit of the magnetic induction (also, magnetic flux density) in the International System of Units.

### Lorentz force

**magnetic forceLorentz force lawLorentz**

The magnetic interaction is described in terms of a vector field, where each point in space is associated with a vector that determines what force a moving charge would experience at that point (see Lorentz force).

Both of these EMFs, despite their apparently distinct origins, are described by the same equation, namely, the EMF is the rate of change of magnetic flux through the wire.

### Maxwell's equations

**Maxwell equationsMaxwell equationMaxwell’s equations**

Gauss's law for magnetism, which is one of the four Maxwell's equations, states that the total magnetic flux through a closed surface is equal to zero.

Equivalent technical statements are that the sum total magnetic flux through any Gaussian surface is zero, or that the magnetic field is a solenoidal vector field.

### Centimetre–gram–second system of units

**CGScgs unitsCGS unit**

### Electromotive force

**EMFelectromotive force (EMF)ℰ**

For example, a change in the magnetic flux passing through a loop of conductive wire will cause an electromotive force, and therefore an electric current, in the loop.

For a time-varying magnetic flux linking a loop, the electric potential scalar field is not defined due to a circulating electric vector field, but an emf nevertheless does work that can be measured as a virtual electric potential around the loop.

### Magnetic circuit

**Hopkinson's lawMagnetic Circuitsair gap**

A magnetic circuit is made up of one or more closed loop paths containing a magnetic flux.

### Faraday's law of induction

**Faraday's lawMaxwell–Faraday equationelectromagnetic induction**

The relationship is given by Faraday's law:

This induction was due to the change in magnetic flux that occurred when the battery was connected and disconnected.

### Electric generator

**generatorgeneratorselectrical generator**

This equation is the principle behind an electrical generator.

The principle, later called Faraday's law, is that an electromotive force is generated in an electrical conductor which encircles a varying magnetic flux.

### Magnetic monopole

**magnetic monopolesmagnetic chargemonopole**

(A "closed surface" is a surface that completely encloses a volume(s) with no holes.) This law is a consequence of the empirical observation that magnetic monopoles have never been found.

So that the phase a charged particle gets when going in a loop is the magnetic flux through the loop.

### Flux linkage

**field flux linkagefluxmagnetic flux linkage**

It is an extension rather than an equivalent of magnetic flux and is defined as a time integral

### Electric flux

**fluxelectric ('''D''')electric induction flux**

The flux of E through a closed surface is not always zero; this indicates the presence of "electric monopoles", that is, free positive or negative charges.

### Physics

**physicistphysicalphysicists**

In physics, specifically electromagnetism, the magnetic flux (often denoted

### Electromagnetism

**electromagneticelectrodynamicselectromagnetic force**

In physics, specifically electromagnetism, the magnetic flux (often denoted

### Surface integral

**surface elementsurface integralsarea element**

) through a surface is the surface integral of the normal component of the magnetic field flux density B passing through that surface.

### Unit of measurement

**unitunits of measurementweights and measures**

### Electronics

**electronicelectronic equipmentelectronic device**

Magnetic flux is usually measured with a fluxmeter, which contains measuring coils and electronics, that evaluates the change of voltage in the measuring coils to calculate the measurement of magnetic flux.

### Voltage

**potential differenceVvoltages**

Magnetic flux is usually measured with a fluxmeter, which contains measuring coils and electronics, that evaluates the change of voltage in the measuring coils to calculate the measurement of magnetic flux.

### Vector field

**vector fieldsvectorgradient flow**

The magnetic interaction is described in terms of a vector field, where each point in space is associated with a vector that determines what force a moving charge would experience at that point (see Lorentz force).

### Field line

**Electric field linesmagnetic flux linesfield lines**

:where B is the magnitude of the magnetic field (the magnetic flux density) having the unit of Wb/m 2 (tesla), S is the area of the surface, and θ is the angle between the magnetic field lines and the normal (perpendicular) to S. Since a vector field is quite difficult to visualize at first, in elementary physics one may instead visualize this field with field lines.

### Vector area

**Surface elementvector element**

If the magnetic field is constant, the magnetic flux passing through a surface of vector area S is

### Normal (geometry)

**normalnormal vectorsurface normal**

:where B is the magnitude of the magnetic field (the magnetic flux density) having the unit of Wb/m 2 (tesla), S is the area of the surface, and θ is the angle between the magnetic field lines and the normal (perpendicular) to S.