1. Not finding help here? Sign up for a free 30min 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!

+ charged sphere and - charged sphere touch and seperate

  1. May 4, 2015 #1
    1. The problem statement, all variables and given/known data
    A small metal sphere X is charged by losing 500 electrons. An identical metal sphere Y is charged by gaining 1000 electrons. The two spheres are first put in contact with each other and then separated. If -e is the charge on an electron, what is the charge on each sphere after separation?

    Sphere X Sphere Y
    A +500 +500
    B +250 +250
    C -250 +250
    D -250 -250
    E -500 -500​

    2. Relevant equations
    n/a ???

    3. The attempt at a solution
    I think the answer is D.
    Since the metal spheres touch each other electrons will be transferred from sphere Y to sphere X so that both have the same charge.
    Is this correct? I
     
  2. jcsd
  3. May 4, 2015 #2

    BvU

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    If the unit of charge is e then I agree.
    You mean to say that there are 250 electrons on each of the two spheres.
    One electron is -e, so 250 electrons is -250e

    If the exercise is literally as you present it, the formulation is a bit unfortunate, but that's not your problem :wink:
     
  4. May 4, 2015 #3
    Thanks. I need to get better at my formulation anyways.....
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted