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Magnetic flux is a measure of the total magnetic field passing through a surface, while magnetic flux density represents the strength of the magnetic field at a specific point in space. One key difference between the two is their units of measurement.
Flux density measures the strength of a magnetic field at a specific point, while magnetic flux quantifies the total magnetic field passing through a surface. Flux density is a vector quantity with both magnitude and direction, whereas magnetic flux is a scalar quantity with only magnitude.
Any quantity that is obtained by integration over a surface is referred to as “flux,” and so it becomes natural to think of \({\bf B}\) as a flux density; i.e., as flux per unit area. The SI unit for magnetic flux is the weber (Wb). Therefore, \({\bf B}\) may alternatively be described as having units of Wb/m\(^2\), and 1 Wb/m\(^2\) \(=\) 1 T.
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 ...
In physics, specifically electromagnetism, the magnetic flux through a surface is the surface integral of the normal component of the magnetic field B over that surface. It is usually denoted Φ or Φ B. The SI unit of magnetic flux is the weber (Wb; in derived units, volt–seconds), and the CGS unit is the maxwell. [1]
Higher flux density indicates a stronger magnetic field, while lower flux density indicates a weaker magnetic field. Flux density is related to flux through the equation B = Φ / A, where B is the flux density, Φ is the flux, and A is the area through which the flux passes.
Magnetic flux density is measured in units of tesla, which is defined as: A straight conductor carrying a current of 1A normal to a magnetic field of flux density of 1 T with force per unit length of the conductor of 1 N m-1.
