Biot-Savart law indicates that the moving electrons (velocity $\vec{v}$) produce a magnetic field $\vec{B}$ such that
- A$\vec{B} \perp \vec{v}$
- B$\vec{B} \parallel \vec{v}$
- CIt obeys the inverse cube law
- DIt is along the line joining the electron and the point of observation
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