Magnetic Flux Density:

Magnetic flux density is the amount of magnetic flux per unit area of a section, perpendicular to the direction of flux. Within the given Equation (1-11) is the mathematical representation of magnetic flux density.

B = Φ/ A                                (1-11)

Where

B =  magnetic flux density in teslas (T)

Φ=   magnetic flux in webers (Wb)

A=   area in square meters (m²)

The result is that the SI unit for flux density is webers per square meter (Wb/ m² ). One weber per square meter equals one tesla.

Example: Find the flux density in teslas, when the flux is 800 µWb and the area is 0.004 m².

Given:  = Φ =800 µWb = 8 x 10^-4 Wb

A = 0.0004 m² = 4 x 10^-4 m²

B =  Φ/A =   8 x 10^-4 Wb/  4  x 10^-4 m²   = 2 Wb/m ²