3. Magnetic flux and properties of magnetic lines of force

The number of magnetic field lines passing through a given area is known as Magnetic flux. It is denoted by the symbol, $\mathrm{\phi }$ and its unit is \(weber\) ($\mathit{Wb}$).

Magnetic flux density is defined as the number of magnetic field lines crossing a unit area in a direction that is normal to the direction of the field lines. $\mathit{Wb}/m^2$ is the unit of measurement for magnetic flux density.