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!

I need help

  1. Mar 22, 2010 #1
    I need help PLZ :(

    1. The problem statement, all variables and given/known data
    A small insulating spherical shell with inner radius a=1cm and outer radius b=2cm is concentric with a larger insulating soherical shell with inner radius c=4cm and outer radius d=6cm . the inner shell has a nonuniform charge distribution =.005 r C/m^3 , and the outer shell has a uniform charge distribution and a total charge of 5 nC .


    2. Relevant equations

    my question is what will the electric field be at boint at a distance r=5cm from the common center of both spheres


    3. The attempt at a solution

    q/(4*pi*E0*(b-a)^2) ??
     
  2. jcsd
  3. Mar 22, 2010 #2
    Re: I need help PLZ :(

    pllllllllllllz :(
     
  4. Mar 22, 2010 #3
    Re: I need help PLZ :(

    Hey zahraa,

    Just determine the volume enclosed by the portion of the outer shell that is contained within your Gaussian surface. Use that to get the portion of the charge enclosed by that part of the shell.

    Then for the nonuniform part of the enclosed charge form an integral over the volume to get the portion of the charge enclosed by the inner shell's volume.

    Add those enclosed charge values and use Gauss' Law for the Gaussian shell with radius 5cm.

    [tex]EA = \frac{q_{in}}{\epsilon_{0}}[/tex]
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: I need help
  1. I NEED HELP AND THANX (Replies: 2)

  2. I Need Help Quick Plz! (Replies: 9)

  3. I Need Some Help Plz (Replies: 1)

  4. Plz i need help ! (Replies: 3)

Loading...