Biot-Savart, law indicates that the moving electrons (velocity $v$) produce a magnetic field $B$ such that
$\vec B \bot \vec v$
$\vec B\,||\,\vec v$
It obeys inverse cube law
It is along the line joining the electron and point of observation
The magnetic field due to a current carrying circular loop of radius $3\, cm$ at a point on the axis at a distance of $4\, cm$ from the centre is $54\, \mu T$. What will be its value at the centre of the loop.......$\mu T$
The magnetic induction at a point $P$ which is distant $4\, cm$ from a long current carrying wire is ${10^{ - 8}}\,Tesla$. The field of induction at a distance $12\, cm $ from the same current would be
A straight wire carrying a current of $14\,A$ is bent into a semicircular are of radius $2.2\,cm$ as shown in the figure. The magnetic field produced by the current at the centre $(O)$ of the arc. is $.........\,\times 10^{-4}\, T$
Discuss similarities and differences of Biot-Savart law with Coulomb’s law
Magnetic field at the centre $O$ due to the given structure is