We know that there exists a force between currents. This phenomenon is similar to the Coulomb force between electric charges. Hence, we can presume that currents also make some field in space similar to the electric field made by electric charges. This field is called the magnetic field.
CITATION STYLE
Matsushita, T. (2014). Current and Magnetic Flux Density (pp. 123–154). https://doi.org/10.1007/978-4-431-54526-2_6
Mendeley helps you to discover research relevant for your work.