Hi! I'm stuck on a problem concerning the magnetic field produced by a long straight conductor: A triangular piece of conductor (N=1) rests in the vicinity of a long straight conductor with a current I=50A. What is the magnetic flux through the triangle if a=1cm? (See attached file). My approach was to try to integrate to find how the field from the conductor varies with distance to be able to find the field's strength in that triangle and then multiply it with the area to get the flux, but I'm getting it all wrong. Is there any general approach to this kind of problem? The correct answer is 7.7*10^-8 Wb. Thanks!