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In the magnetic field due to a current i...

In the magnetic field due to a current in a straight wire segement of length L at a point on its perpendicular bisector at a distance `r(r gt gt 1)`.
decreases as `(1)/(r)`
decreases as `(1)/(r^(2))`
decreases as `(1)/(r^(3))`
approches a finite limits as `r to oo`

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