An electric field perpendicular to a magnetic field is used as a velocity selector for Li⁺ ions, selecting the velocity v₁. Next, Li⁺⁺ ions are sent through the same velocity selector, selecting velocity v₂. If neither the electric nor magnetic fields have changed between the two processes, how do v₁ and v₂ compare? A) v₂ = v₁ B) v₂ = 2 v₁ C) v₂ = v₁/2 D) v₂ = 4 v₁ E) v₂ = v₁/4

Question

Quizplus · Accepted Answer

The velocity selector only depends on the ratio of the electric and magnetic field strengths, which is the same for both processes. Therefore, the selected velocities will be the same in both cases.

An Electric Field Perpendicular to a Magnetic Field Is Used