1. The problem statement, all variables and given/known data There's a uniform infinite line charge with the charge density λ. A point particle with charge q moves with a velocity v parellel to infinite line. What is force exerted on point particle? What is magnetic field seen in ths moving frame(particle frame)? 2. Relevant equations Basic E&M, Maxwell's equations. 3. The attempt at a solution 1) What is difference between "stationary wire & moving charge" and "moving wire & stationary charge" ? First one will generate electric field and second one will generate magnetic field(current). Am I right?