Magnetic field at a distance r from an infini | vedclass

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(C) According to the Biot-Savart law,the magnetic field $B$ at a perpendicular distance $r$ from an infinitely long straight current-carrying conducto

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$1/r$

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(C) According to the Biot-Savart law,the magnetic field $B$ at a perpendicular distance $r$ from an infinitely long straight current-carrying conductor is given by the formula:$B = \frac{\mu_{0} I}{2 \pi r}$Here,$\mu_{0}$ is the permeability of free space and $I$ is the steady current flowing through the conductor.Since $\mu_{0}$,$I$,and $2 \pi$ are constants,we can see that the magnetic field $B$ is inversely proportional to the distance $r$.Therefore,$B \propto \frac{1}{r}$.

Magnetic field at a distance $r$ from an infinitely long straight conductor carrying a steady current varies as

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