Don't know where to begin....mag field question 1. The problem statement, all variables and given/known data http://s685.photobucket.com/albums/vv212/dewdr0p714/?action=view¤t=physicsexam2q2.jpg Each support string connects to a corner of the rectangular ceiling. The current carrying wires are .5m apart. The current carrying wires have a mass per unit length of .150 kg/m. The currents are identical and in opposite directions. Point A is 1m away from the wire on the right Point B is exactly between the 2 wires Point C is 1.5 m away from the wire on the left (all the points are in the same plane as the 2 wires) b) Determine the magnetic field B at Point A, Point B, and Point C 2. Relevant equations i think this formula is supposed to be used but I'm not sure...B = F / |q0|(vsinθ) 3. The attempt at a solution I just dont know where to begin with this problem...can anyone give me any pointers?