In bio savart law direction of magnetic field is shown by $d\vec B = \frac{{{\mu _0}}}{{4\pi }}\frac{{I\overrightarrow {dl} \times \vec r}}{{{r^3}}}$
In bio savart law direction of magnetic field is shown by $d\vec B = \frac{{{\mu _0}}}{{4\pi }}\frac{{I\overrightarrow {dl} \times \vec r}}{{{r^3}}}$
- A
$\vec r \times I\overrightarrow {dl} $
- B
$I\overrightarrow {dl} \times \vec r$
- C
$(A)$ and $(B)$
- D
None
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