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: Need help with electric field

  1. Jan 29, 2010 #1
    1. The problem statement, all variables and given/known data

    please some one help me with this problem:

    Consider a thin spherical shell of radius 18.7cm with a total charge of 2.60μC distributed uniformly on its surface. Find the electric field, in N/C, at a radius of 32.4cm from the center of the charge distribution.


    i used this equation:
    E=Q/(4 x Pi x Eo x r^2)



    this question was a quiz and i think i got it wrong. please help

    2. Relevant equations
    E=Q/(4 x Pi x Eo x r^2)

    in this case : Q is 2.6e-6
    and r= 32.4
    Eo=8.854e-12
    3. The attempt at a solution
    E=2.6e-6/( 4 x pix 8.85e-12 x 32.4^2)
    = 22.26N/C
    i plugged in all the number and i got 22.26 whick is wrong. dont know wat i did wrong here
     
    Last edited: Jan 29, 2010
  2. jcsd
  3. Jan 29, 2010 #2

    rl.bhat

    User Avatar
    Homework Helper

    Write the distance in meter.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook