Question: A charged particle moves through a velocity selector at a constant speed in a straight line. The electric field of the velocity selector is 4.50 x 103 N/C, while the magnetic field is 0.360 T. When the electric field is turned off, the charged particle travels on a circular path whose radius is 4.65 cm.
1- Find the charge-to-mass ratio of the particle.
Please show how you obtained the answer of above question.