1. The problem statement, all variables and given/known data Problem given in the image attached. Uniform Magnetic Field : B Positive Charge : q Uniform Velocity : v Mass : m Charged particle enters the magnetic field making an angle θ with the plane perpendicular to the magnetic field. Width of the region of Magnetic field : d d < (mv/qB) 2. Relevant equations qvB = (mv2)/r Where 'r' is the radius of the circular arc that the particle will move along in the magnetic field. 3. The attempt at a solution All that I could see through is that in the given problem, radius of the circular arc is greater than the width of the magnetic region and that the particle would come out through the other end of the region and move along the tangent at that point.