English Name: magnetic field strength
In 1820, the Danish scientist Oster (H. C. Oersted) found that conductors with current which can be near the needle deflection, which reveals the basic relationship between electricity and magnetism, the birth of electromagnetics. Practice shows that: the magnetic field intensity and current with current of the infinitely long wire produced in its surroundings is proportional to the size of, and inversely proportional to the distance from the wire. The definition of carrying 1 amperes of current of the infinitely long conductor in the magnetic field strength of conductor 1/2 PI meters distance is 1A/m (an / m, the international system of units; SI) in the CGS unit system (CGS), to commemorate the contributions of Oster to electromagnetism, infinite conducting wire carrying 1 amperes of current in the definition distance of line 0.2 cm distant magnetic field strength 1Oe (Oster), 1Oe=1/ (4 pi * 103) A/m. The strength of the magnetic field is usually expressed in H.
The strength of the magnetic field is a characterization of the amount of the coil, magnetic field intensity of the source reflection. At a given point of the magnetic induction intensity B and the magnetic constant business and magnetization M difference. In a vacuum, as the magnetic induction intensity B and the magnetic constant business. Vector symbol "H". |
