Question

define Baio'ts law , write it's vector from?​

Answer 1

Answer:

The Biot Savart's Law we know is given by: δB =4πμ0r2Idlsin(θ)r^, where θ is the angle between the line element dl and the radial unit vector r^. Now we know: r^=rr , using this and the cross product of two vectors we get; δB =4πμ0r3I(dl ×r ) Answer verified by Toppr.