1. The problem statement, all variables and given/known data Two wires shown in figure p19.48 carry currents of 5.00A in opposite directions and are seperated by 10cm. Find direction and magnitude of the net mag field. (a) at a point midway between the wires. (b) at point P1 (c) at point P2 2. Relevant equations B=B1+B2?? B= u0I / 2pir 3. The attempt at a solution How would i approach a question like this? How does opposite charges affect the sign in the equation B1+B2? Thanks!