Magnetic flux is a measure of the strength of the magnetic field in an electric coil through which current flows. It results from the product of the number of turns (N) of the coil and the current (I), i.e. the total of the currents involved in the construction of the circuit ( ampere-turn number).
The relationship between magnetic field strength (H) and electric current strength (I) is referred to as the flow-through theorem: The flux through the area bounded by a field line is equal to the circulating magnetic voltage.
Magnetic potentials are distributed around a straight conductor. They can also be given as a function of the angle.