In a velocity selector consisting of perpendicular electric and magnetic fields, the speeds of the
charged particles passing through the selector are increased or decreased until they are equal to the
desired speed.

Question

Quizplus · Accepted Answer

In a velocity selector, only particles with a specific velocity (which equals the ratio of the electric field strength to the magnetic field strength) pass through undeflected. The device does not change the speeds of the particles; it filters them based on their velocity.

In a Velocity Selector Consisting of Perpendicular Electric and Magnetic