1. The problem statement, all variables and given/known data A particle with charge q moves with velocity v near a long, straight wire which has a current I flowing through it which generates magnetic field B. Give an expression for the magnitude of the force on this particle in terms of q, v = | v | and the magnitude of the magnetic field strength B. Make sure you define any other variables that you introduce. 2. Relevant equations F = q(v x B) 3. The attempt at a solution Could it be as simple as just quoting F = q(v x B)? I feel as though I may be missing something as this would seem a little too straight forward. Cheers guys.