Given The Magnetic Field 202 A/m:
Sources of Magnetic Fields 9.1 Biot-Savart Law Currents which arise due to the motion of charges are the source of magnetic fields. When charges move in a conducting wire and produce a current I, the magnetic field at any point P due to the current can be calculated by adding up the magnetic field contributions, dB, from small segments of the wire G.
Let's begin by defining some terms. Magnetic fieldis one of two components of the electromagnetic field. Technically speaking, it refers to a region where forces acting on moving electric charges can be detected. Magnetic fields are created by either moving electric charges or variable electric field. The charge movement that creates the field may be macroscopic (currents in conductors), or microscopic. The latter type is associated with spin and orbital motion of electrons, resulting in so-called 'magnetic materials'.The SI unit for magnetic flux is the weber (Wb).
Given The Magnetic Field 202 A/m: Number
If this flux changes by 1 Wb over a time of 1s, then a voltage of 1 V is induced in a conductive loop encircling it: 1 Wb = 1 Vs.The flux density is called induction. The SI magnetic induction unit B is tesla (T): 1 T = 1 Wb/m 2 = 1 Vs/m 2. Mathematically, magnetic field with density of 1 T generates one newton of force per ampere of current per meter of conductor.When the fields generated by currents pass through some materials they can produce magnetization in the direction of the applied field. In ferromagnetics it results in increased total field B.Quantity called magnetic field strength (magnetizing force) is a measure of the applied magnetic field from external currents, independent of the material's response.
Given The Magnetic Field 202 A/m: Map
CGS unit of magnetic field strength is oersted, and SI unit is ampere/meter. Magnetisation defines the material's response- it is magnetic moment per unit volume of material. Flux density (magnetic induction) describes the resulting field in the material, which is a combination of an applied field and the magnetization. In power electronics it is the main quantity used in calculation of the required cross-sectional area of power transformer cores for given voltage and frequency (see engineering reference info on ).Below you will find converters for the magnetic units and the table with the magnetism formulas and factors in both SI and CGS systems.