IN a physics lab, a student discovers that the magnitude of the magnetic field at a certain distance from a long wire is 4.0μT.
If the wire carries a current of 5.0 A, what is the distance of the magnetic field from the wire?
1 answer:
Answer:
0.25 m
Explanation:
The intensity of the magnetic field around a current-carrying wire is given by:

where
where
is the permeabilty of free space
I is the current
r is the distance from the wire
In this problem, we know:
is the magnetic field
is the current in the wire
Re-arranging the equation, we can find the distance of the field from the wire:

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