1. The problem statement, all variables and given/known data Two particles A and B having equal charges +6C, after being accelerated through the same potential difference enter a region of uniform magnetic field and describe circular path of radii 2 and 3cm repectively. The ratio of mass of A and B is ______ 2. Relevant equations Force on the particle in a magnetic field = Bqv In a circular path, mv^2/r = Bqv →r = mv/Bq 3. The attempt at a solution I don't know if I should consider their velocities to be equal. If the velocities are equal, the r(A)/r(B) = 2/3 which is incorrect.