Change the chapter
Question
A proton moves in the –x-direction and encounters a uniform magnetic field pointing in the +x-direction. In what direction is the resulting magnetic force on the proton?
  1. The proton experiences no magnetic force.
  2. +x-direction
  3. −y-direction
  4. +y-direction
Question by OpenStax is licensed under CC BY 4.0.
Final Answer

(a)

Solution Video

OpenStax College Physics Solution, Chapter 22, Problem 7 (Test Prep for AP® Courses) (0:19)

Sign up to view this solution video!

View sample solution
Video Transcript
This is College Physics Answers with Shaun Dychko. Because this proton's velocity is parallel to the magnetic field or anti-parallel if you want to be precise because they're going in opposite directions, there is no magnetic force at all on this moving charge.