1. The problem statement, all variables and given/known data Show the mathematical relationship between magnetism and electricity by looking at constants 2. Relevant equations I have several equations but in don´t really know which one I have to use and I don´t see any big similarities except that there is force, charge, velocity and distance involved. I have no idea what I have to do. 3. The attempt at a solution I tried to play a little bit with Coulomb's Law and the equation F=BIL and F=Bvq but I don´t know that that´s what he wants the realtionship for. Since you guys probably know what my teacher wants, maybe you could give me some help to start. I don't know where I have to find a relationship. Do I have to look at the field-equetions and the force or maybe B or E?