(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A wire comes in from in finity (left side) and forms a shape by going up a length A, over a lenght A and back down a length A.(forming three sides of a square that is attached to this infinite wire), then

takes a turn and leaves the page opposite to the side it came in on, headed to infinity.

There is a particle along the horizontal axis of this, a lenght 1/2 A from the left or right side of the shape, what is the magnetic field at that point,

2. Relevant equations

3. The attempt at a solution

the answer is (sqrt 5)/5 * (Mu * I)/pi A But I have no idea how to get there

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# Force due to three magnetic fields

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