1. What are the magnetic field strength and direction at points 1 to 3 in the figure? Okay, sorry, once again i dont know how to get the picture up here so ill describe it! There are 2 long wires 4 cm apart, the one on top with a current of 10 A in the positive x direction and the one on the bottom with a current of 10 A in the negative x direction. Point 1 is 2cm above the top wire. Point 2 in directly in between the two wires. Point 3 is 2cm underneath the bottom wire. 2. Relevant equations Okay so here im thinking something along the lines of that B = (u0/4pi)(Is 'r-hat'/r^2) or maybe i found this equation in my notes that could be helpful and my gut says its the better bet B = (u0I)/(2pid) 3. The attempt at a solution Point 1 : (u0*10A)/(2pi*0.02m) Point 2 : since it is inbetween two wires with opposite currents, so opposite fields (???) my guess is that it is equal to 0??? Point 3 : the opposite of point 1 Im also curious as to whether we assign a negative or positive value to the current?? And also would the bottom wire have an effect on the magnetic field at point 1??