# Read This to Know What Magnetic Flux Means and How to Calculate It

Magnetic Flux is a measurement of magnetism exhibited by an object in a two dimensional area. This is also referred to as electromagnetism and is used to calculate the density of the magnetic field.

ScienceStruck Staff

Last Updated: Sep 28, 2018

Measurements

Equation

Magnetic flux is the product of the field lines and the sine of the angle, formed between the area and magnetic field. If the angle is 90º (i.e. the area is perpendicular to the field), then the equation is (flux lines) x Sin 90º. The unit of measurement is weber (Wb). The symbol used is Φ (phi).

^{8}field lines ~ 1 x 10

^{8}field lines.

**If a flux has 5000 field lines then how much is the flux? 10**

*Example*:^{8}field lines/5000 = 2 x 10

^{4}Wb

Density

The amount of flux per unit area of the field, which is perpendicular to the direction of flux, is termed as flux density. It is measured in Telsa (T).

Density (T) = Flux (Wb) / Area in m

Density (T) = Flux (Wb) / Area in m

^{2}**From this example, the flux calculated is 2 x 10**

*Example*:^{4}Wb. So, the flux density for that area is 2 x 10

^{4}Wb/m

^{2}~ 2 x 10

^{4}Telsa. Similarly, one can calculate the flux if the density is provided. Then the equation would be Φ = (Flux Density) x Area x Cos Ө.

Magnetic Flux Through a Coil