The magnetic flux density is defined as a concentration of magnetic field lines of magnetic flux per unit cross-sectional area and H denotes the permeability of the material. When electric current flows through a wire or coil, the magnetic field strength (H) is measured. H is the strength of the magnetizing field created by the current flow.
For a wire carrying a current, one needs to take into account the radial distance to the wire and the intensity of the current. The formula is B = μ0·I/2·π·r. What is magnetic flux density measured in?
Thus, the difference is in that mass flux is measured per unit of time, while the mass flow rate is calculated as a total, for some specified time period, but not per unit of surface area. In fact, mass flux can be defined as mass flow rate per unit of area. Mass flux is commonly used in environmental assessment.