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: Gauss's Law, electric field of sphere

  1. Feb 3, 2010 #1
    Q:
    A nonconducting sphere of radius 10.00 cm carries a uniform volume charge density ρ = 410 nC/m3.

    (a) What is the total charge of the sphere?
    1.717 nC

    Find the electric field at the following radii.

    (b) r = 2.10 cm
    _____N/C

    (c) r = 9.90 cm
    _____kN/C

    (d) r = 10.10 cm
    _____N/C

    (e) r = 13.6 cm
    _____N/C


    My attempt at the problem, after manipulating the equation EV=charge inside/[8.85x10^(-12)], was just to insert values into E=Qr/[(4*pi*R^3)*8.85x10^(-12)]; where Q is defined as the total charge, r the radius asked to calculate and R the initial radius.
     
  2. jcsd
  3. Feb 3, 2010 #2

    rl.bhat

    User Avatar
    Homework Helper

    Your attempt is correct.
     
  4. Feb 4, 2010 #3
    Thank you for responding.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook