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Flux density can be calculated from the equation below. B = I/A . B = Flux density measured in Webers per metre squared (Wm -2). I = Magnetic flux measured in Webers (W). A = Cross sectional area perpendicular to the field lines measured in metres squared (m 2) .
Rearranging the equation for magnetic force on a wire, the magnetic flux density is defined by the equation: Where: B = magnetic flux density (T) F = magnetic force on a current-carrying wire (N) I = current (A) L = length of the wire (m) For reference, the Earth's magnetic flux density is around 0.032 mT and an ordinary fridge magnet is around ...
To further distinguish B from H, B is sometimes called the magnetic flux density or the magnetic induction. The quantity M in these relationships is called the magnetization of the material. Another commonly used form for the relationship between B and H is. B = μ m H. where. μ = μ m = K m μ 0.
Magnetic flux density (\({\bf B}\), T or Wb/m\(^2\)) is a description of the magnetic field that can be defined as the solution to Equation \ref{m0005_eFqvB}. Figure \(\PageIndex{4}\): The magnetic field of a bar magnet, illustrating field lines.
If the magnetic field is constant, the magnetic flux passing through a surface of vector area S is = = , where B is the magnitude of the magnetic field (the magnetic flux density) having the unit of Wb/m 2 , S is the area of the surface, and θ is the angle between the magnetic field lines and the normal (perpendicular) to S.
The definition of H is H = B/μ − M, where B is the magnetic flux density, a measure of the actual magnetic field within a material considered as a concentration of magnetic field lines, or flux, per unit cross-sectional area; μ is the magnetic permeability; and M is the magnetization.
Magnetic Flux Density. The grouping of H and M in Faraday’s law and the flux continuity law makes it natural to define a new variable, the magnetic flux density B. B ≡ µo(H+M) (8) This quantity plays a role that is analogous to that of the electric displacement · ·a =
