##  [Biot-Savart Law](/biot-savart-law) 

  ##  [Biot-Savart Law](https://engineering.quantumdictionary.io/biot-savart-law-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The integral law that gives the magnetic flux density B(r) produced by a steady current distribution J or a filamentary current I: for a current element in vacuum, dB(r) = (μ0/4π) · (I dl × r̂)/r^2 and B(r) = (μ0/4π) ∫ (I dl' × (r−r'))/|r−r'|^3, integrated over the current path or volume.