1. The problem statement, all variables and given/known data Two long, straight, parallel wires carry currents that are directed perpendicular to the page as shown in Figure P30.9. Wire 1 carries a current I1 into the page (in the negative z direction) and passesthrough the x axis at x a. Wire 2 passes through the x axis at x 5 22a and carries an unknown current I 2. The total magnetic field at the origin due to the current-carrying wires has the magnitude 2uI1/(2pia). The current I 2 can have either of two possible values. (a) Find the value of I 2 with the smaller magnitude, stating it in terms of I 1 and giving its direction. (b) Find the other possible value of I 2. Diagram is attached as well as the solution. 2. Relevant equations B = uI1/(2pia) 3. The attempt at a solution I understand how to do the question but determining the direction of the magnetic field due to I2. I1 is directed into the page (+j). They get the answer to (a) as +j as well but they said the direction of the magnetic field is out of the page, why?