One, English: magnetic induction intensity (Magnetic flux density) the magnetic flux density (Magnetic flux density)
Two, the definition: magnetic induction intensity: the basic physical quantities describing the magnetic field strength and direction. Is a vector, commonly used symbols B said. The magnetic induction intensity is also known as the magnetic flux density or magnetic flux density: is an alias of the magnetic induction intensity, it indicates how much vertical through a unit area of the magnetic field lines. The magnetic flux density, referred to as the magnetic flux density
Three, the theory and practice show: applying a magnetic field H on any medium (the magnetic field from the current or external permanent magnet to provide, Ka Yunaga magnet to provide, on a permanent magnetic medium itself is composed of a permanent magnet to provide permanent magnetic medium itself is also called magnetic field demagnetizing field), the strength of the magnetic field inside the material is not equal to H, but for the performance of magnetic polarization J H with medium and. Because of the strength of the magnetic field by the magnetic field inside the medium is H through the medium of induction and expression comes out, as the H and the difference, called the magnetic induction medium, denoted as B:B= (oH+J) (SI units) (1-1) (B=H+4) M (CGS units) the magnetic induction intensity B unit for T CGS unit, is GS (1T=10) (Gs).
Four, for the non ferromagnetic medium such as air, water, copper, aluminum and so on, the magnetic polarization intensity J, magnetization M is almost equal to 0, so in these medium magnetic field intensity H and the magnetic induction intensity equal to B. Because the magnetic phenomena can be vividly represented by magnetization idle, so the magnetic induction intensity B and the magnetic lines of force can be defined as the flux density, magnetic induction intensity B and the magnetic flux density B can be conceptually general.
Five, magnetic flux, magnetic flux density, magnetic field intensity, magnetic induction intensity have what different? Flux: a number of vertical through in a certain area of the magnetic lines of force, with Phi said unit Webb (Wb). The magnetic flux density, magnetic flux per unit area, denoted B, is a unit of Tesla (T) or Gauss (Gs). The strength of the magnetic field in the field: for every point has magnitude and direction, it can use the vector H said the point size of the magnetic field, and is consistent with the direction, ampere / M (A/m). The magnetic induction intensity: the strength of the magnetic field inside the material, the unit Oster (Oe). |
