# Different Laws For Calculating Magnetic Field-biot-savart Law

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**Different laws for calculating magnetic field-Biot-Savart law;**** **We know that any current carrying conductor produces a magnetic field. A magnetic field ℜ is characterized either byH, the magnetic field intensity or by B, the magnetic flux density vector.These two vectors are connected by a rather simple relation:B=μ_{r}μ_{o}H;

where** μ=4π*10 ^{-7} H/**M is called the absolute permeability of free space and μ

_{r}, a dimensionless quantity called the relative permeability of a medium (or a material). For example the value of μ

_{r}is 1 for free space or could be several thousands in case of ferromagnetic materials.