1. The problem statement, all variables and given/known data a long straight wire lying along the x-axis carries current I flowing in the +x direction. A second long straight wire lying along the y-axis carries current I/2 in the +y direction. where is their combined magnetic field zero? 2. Relevant equations Ampere's Law/biot-savart law 3. The attempt at a solution where do i begin?? pls help.thanks.