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!

Electric field lines from a metal shell and sphere

  1. Apr 1, 2016 #1
    1. The problem statement, all variables and given/known data
    A metal sphere of charge +6μC is surrounded by a metal shell of net charge +6μC. Which of the following diagrams represents the electric field lines of the system?

    2. Relevant equations


    3. The attempt at a solution
    The correct answer provided by my teacher is a figure with 12 arrows pointing out of the shell, and 6 arrows pointing out of the inner sphere.

    Can you guys explain to me physically and in detail why this is the case? My guess is that since the net charge of the system is 6+6=12μC, 12 arrows would be pointing out in total.
     
  2. jcsd
  3. Apr 1, 2016 #2

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    That is correct. If you want a more detailed view, consider how the charges on the shell are distributed between its inner and outer surfaces.
     
  4. Apr 1, 2016 #3
    Hi haruspex,
    I'm guessing that the inner +6μC would induce a -6μC on the inner surface of the outer shell. Thus the total charge Q is:
    Q = 6 = -6 + q_outer
    q_outer = +12μC
     
  5. Apr 1, 2016 #4

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    Yes.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Electric field lines from a metal shell and sphere
Loading...