Magnetic Flux

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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.
Magnetic flux
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) a honor given to Wilhelm Eduard Weber.
The older units for the magnetic flux, the Maxwell (equivalent to $10^{-8}$ Wb).

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