The vector form of Biost-Savart law for a current carrying element is

Options

A. `d vec(B) = (mu_(0))/(4pi) (idl sin phi)/(r^(2))`
B. `d vec(B) = (mu_(0))/(4pi) (ivec(dl) xx hat(r))/(r^(2))`
C. `d vec(B) = (mu_(0))/(4pi) (ivec(dl) xx hat(r))/(r^(3))`
D. `dvec(B) = (mu_(0))/(4pi) (ivec(dl)xx vec(r))/(r^(2))`

Answer

B