1. The problem statement, all variables and given/known data There are two particles side by side in a vacuum with electric charge q and mass m, traveling at distance d apart, with v speed(less than speed of light). What is the ratio of magnitude of magnetic to electric force the particle exert on each other? 2. Relevant equations F(mag)/ F(elec) is the ratio Fm= kq1q2/ r2 and Fe=qvB 3. The attempt at a solution Fm/ Fe =(qvB) / (kq1q2/ r2) = vBr2/ kq Does this look correct? And would this ratio have no units?