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: Electric Field Strength Inside Concentric Uniformly Charged Spheres

  1. May 10, 2012 #1
    1. The problem statement, all variables and given/known data

    The graph in the figure shows the electric field strength (not the field lines) as a function of distance from the center for a pair of concentric uniformly charged spheres. Which of the following situations could the graph plausibly represent? (There may be more than one correct choice.)

    A positively charged nonconducting thin-walled spherical shell inside of a positively charged conducting sphere.
    A positively charged conducting sphere within another positively charged conducting sphere.


    2. Relevant equations

    3. The attempt at a solution

    Alright, so I know that the above two are the only plausible situations, but I'm just trying to understand exactly why.

    For the second one, I think I understand. The electric field inside a conductor is 0, and outside, it falls off as 1/r^2. The start of the curve along 0 depicts the inside of the conductor, where the negative slope is depicting the space outside of the sphere before it reaches the walls of the sphere containing it? I'm a little confused there...(I hope I'm making some sense at least!)

    For the first instance, I'm really confused. I honestly don't know how to conceptualize that one at all.

    Any help would be great! Thanks!
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted