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 for AP® Courses, Chapter 22, Problem 7 (Test Prep for AP® Courses)

OpenStax College Physics, Chapter 22, Problem 7 (AP) video thumbnail

In order to watch this solution you need to have a subscription.

Start free trial Log in
vote with a rating of votes with an average rating of .
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.