(Please pretend that this problem has a very cool name)
2 wires A and B run parallel to each other, 1 below the other, and both carry a current of 5 Amperes (also flowing parallel). They have a distance of 4mm between them. A charge R exists 6mm beneath the seconds wire (wire B).
The Magnetic Field that R experiences is 2.67E-x
What is the value of x?