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# magnetic flux density

## noun

- a measure of the strength of a magnetic field at a given point, expressed by the force per unit length on a conductor carrying unit current at that point B Also calledmagnetic induction

magnetic flux density

- A vector quantity measuring the strength and direction of the magnetic field around a magnet or an electric current. Magnetic flux density is equal to
**magnetic field strength**times the**magnetic permeability**in the region in which the field exists. Electric charges moving through a magnetic field are subject to a force described by the equation**F**= q**v**×**B**, where q is the amount of electric charge, v is the velocity of the charge, B is the magnetic flux density at the position of the charge, and × is the**vector product**. Magnetic flux density also can be understood as the density of magnetic lines of force, or magnetic flux lines, passing through a specific area. It is measured in units of tesla. - Also called magnetic flux magnetic induction

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