1. The problem statement, all variables and given/known data In the figure, the top wire is 1.5 mm diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current flow through the two bottom wires is 70 A in each. Calculate the required current flow in the suspended wire. 2. Relevant equations F=(I1I2μo*length)/2πr F=(r2πρ)/length 3. The attempt at a solution I cancelled length and now have combined: (r2πρ)=(I1I2μo)/2πr I1 = 70A ρ (density of copper) = 8.92g/cm2 μo = 4π*10-3 r (on the left side) = .15cm/2 r (on the right side) = 3.8cm I just plug these in and find I2....? I have tried to, but I keep getting the wrong answer.. maybe my r's are mixed up? I tried switching them, but still wrong.. I think I am missing something, maybe my wrote down the equations incorrectly.. please help! I don't need the final answer, I'm more interested in learning how to do this type of problem. Thank you in advance!