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

Because of the 2 wires in the figure,

For what value of the ratio I1/I2 is the magnetic field zero at the point A? point B? point C?

2. Relevant equations

http://tinypic.com/r/5otweg/7

3. The attempt at a solution

I honestly have no idea where to start with this problem, any help is appreciated!

I tried to upload the picture and it seems to not be working for me? My computer is really old so i dont know if its just not loading, if not here's the figure. http://tinypic.com/r/5otweg/7

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# Homework Help: Magnetic field due to wires.

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