# Velocity Selector#

## Question Text#

A charged particle moves through a velocity selector at constant velocity. In the selector, $$E = {{params.E}} \times 10^{4}\textrm{ N/C}$$ and $$B = {{params.B}}\textrm{ T}$$. When the electric field is turned off, the charged particle travels in a circular path of radius $${{params.r}}\textrm{ mm}$$. Determine the charge-to-mass ratio of the particle.