1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Proton/Electron Problem

  1. Jun 15, 2008 #1
    Question: An electron is moving towards a source charge, and slows down. What is the source charge (a proton or an electron)?

    I feel like this question is pretty vague (because it says it moves towards the charge (making me think proton), but yet it slows down (making me think electron)) and I'm wondering how you guys would answer it.
  2. jcsd
  3. Jun 15, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    You cannot infer the identity of the source charge from the fact that an electron is moving towards it. It could be moving towards it due to some external agent. You can only infer the identity of the source charge from the fact that it slows down.
  4. Jun 15, 2008 #3
    So it would be an electron.

    Does an electron ever slow down as it approaches a proton in terms of it slowing down to fall into orbit?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook