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: Voltage potential due to 2 charges

  1. Feb 1, 2007 #1
    1. The problem statement, all variables and given/known data
    Find the potential at points a and b in the diagram for charges Q1 = +1.60 nC and Q2 = -1.60 nC.

    I know b is 0

    2. Relevant equations

    V = kQ/r

    3. The attempt at a solution

    I tried this using the equation and got

    8.99e9 * [( +1.60e-6 / .05) + ( -1.60e-6 / .15 ) ] = 191700 V but this isn't right any suggestions??
  2. jcsd
  3. Feb 1, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    If its nancoulombs as the question suggests then you've just made a numerical error in the solution. Nano = x10-9
  4. Feb 1, 2007 #3
    Wow how'd I miss that thanks!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook