1. The problem statement, all variables and given/known data Problem statement along with relevant diagram attached with picture below. 2. Relevant equations The Biot-Savart Law for a long current carrying wire. B = (μ)(I)/2(pi)(d) Where d is the perpendicular distance between the wire and the point at which the field is being calculated. μ is the permeability of free space. 3. The attempt at a solution (a) Point at which field is null: Net magnetic field = 0. Thus, the sum of the magnetic fields at a certain point is 0. (One will point into the page and one will point out of the page) Thus: Bnet = 0 ⇔ (μ)(I1)/2(pi)(ρ) = (μ)(I1/2)/2(pi)(d - ρ) Calculate ρ. I think it works out to be 2d/3. Could someone tell me if this is correct? Also, for part (b) what adjustment should be made? Assuming I did (a) correctly. Thanks.