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 Potential outside of a spherical conductor

  1. Jan 30, 2012 #1
    1. The problem statement, all variables and given/known data

    The potential outside of a spherical conductor is given by V = keQ/r. Using Er = -dV/dr, derive the electric field outside this charge distribution.

    3. The attempt at a solution

    I attempted to take the negative derivative of V being -1/(r2) and then multiplying it by Ke and Q as they're both constant. But alas it says it is wrong so I am stuck. Help?
  2. jcsd
  3. Jan 30, 2012 #2
    I think you got the sign wrong. The two negatives cancel each other
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook