# Magnetic Flux

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#### Wilhelm Eduard Weber

##### Wilhelm Eduard Weber
Physicist
October 24, 1804 - June 23, 1891
An important contributor to the establishment of a system of absolute units for the electrical sciences, which was beginning to become a very active area of research and development. Established a definition of electric current in an electromagnetic system based on the magnetic field produced by the current. He was politically active and, in fact, was dismissed from the faculty of the University of Gottingen for protesting the suppression of the constitution by the King of Hanover in 1837. However, he found other faculty positions and eventually returned to Gottingen as director of the astronomical observatory. Received honors from England, France, and Germany, including the Copley Medal of the Royal Society.
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#### What is Magnetic Flux?

Magnetic flux is a measure of the amount of magnetic field passing through a given surface (such as a conducting coil).
It gives the measurement of the total magnetic field that passes through a given surface area. Here, the area under consideration can be of any size and under any orientation with respect to the direction of the magnetic field.
Fig.no.1: Magnetic flux

#### Magnetic Flux Symbol

Magnetic flux is commonly denoted using greek letter Phi ($\Phi _B$).

#### Magnetic Flux Formula

Magnetic flux formula is given by: $$\Phi _B = B.A=BA \, cos\theta \, \text{(weber)}$$ Where,
$\Phi _B$ is the magnetic flux.
B is the magnetic field.
A is the area
$\theta$, the angle at which the field lines pass through the given surface area.

#### Magnetic Flux Unit

The unit of the magnetic flux is the tesla meter squared ($T. m^2$, also called the weber - the SI unit of magnetic flux and symbolized Wb). The older units for the magnetic flux, the Maxwell (equivalent to $10^{-8}$ Wb).
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