I'm not sure what i'm doing wrong... Two long straight wires are parallel and 5.0 cm apart. They are to carry equal currents such that the magnetic field at a point halfway between them has magnitude 320 µT. (a) Should the currents be in the same or opposite directions? same opposite correct check mark (b) How much current is needed? wrong check mark A Here is my work: http://show.imagehosting.us/show/916283/0/nouser_916/T0_-1_916283.jpg Thanks!