This problem doens't seem hard, but I am rusty on the right hand rule...(adsbygoogle = window.adsbygoogle || []).push({});

Four electric currents, equal in magnitude are arranged at the corners of a square as shown in the figure.

http://img368.imageshack.us/img368/2654/fourcurrents7jc.jpg [Broken]

Two currents go into the page (marked by x), and two are pointing out of the page (marked by a dot). Point a is at the center of the square, and points b and c are in the middle of two of the sides. What is the direction of the magnetic field at points a, b, and c?

I am guessing a and b are down and c is zero? Is this right? I am screwed if I get this problem wrong :(

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# Homework Help: Four electric currents

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