Question

what is the defination of magnetic flux density

Answer 1

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$\underline{\:MAGNETIC\:FLUX\:DENSITY\:}$

Magnetic flux per unit area is called magnetic flux density or magnetic induction.

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Answer 2

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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.