1. Not finding help here? Sign up for a free 30min 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!

Why can't i calculate this system of electric potential?

  1. Sep 25, 2005 #1
    Hello everyone, i'm having troubles figuring out why this problem is wrong. In the quark model of fundamental particles, a proton is composed of three quarks: two "up" quarks, each having charge +2e/3, and one "down" quark, having charge -e/3. Suppose that the three quarks are equidistant from one another. Take the distance to be 1.32 10-15 m.

    (a) Calculate the electric potential energy of the system of only the two "up" quarks.
    wrong check mark eV
    (b) Repeat for all three quarks.

    for (a) I used the following i found in the boook:
    The electric potential enegery of a system of fixed point charges is equal to the work that must be done by an external agent to assemble the sytem, bringing each chage in from an infintie distance.

    U = W = q2V = (1/4Pi*Eo)((q1*q2)/r);
    U = (1/4Pi*Eo)(2/3)^2/(1.32e-15m) = 3.03E24 eV which is wrong, what did i mess up? Thanks.
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted

Similar Discussions: Why can't i calculate this system of electric potential?
  1. Electric energy (Replies: 0)

  2. Electrical field (Replies: 0)

  3. Potential Divider (Replies: 1)