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!

E field problem, just a simple question

  1. Aug 29, 2011 #1
    Two point particles, each having a charge equal to q, sit on the base of an equilateral triangle that has sides of length L as shown in the figure below. A third point particle that has a charge equal to Q = 5q sits at the apex of the triangle. A fourth point particle that has charge q' is placed at the midpoint of the baseline making the electric field at the center of the triangle equal to zero. What is the value of q' ? (The center is in the plane of the triangle and equidistant from all three vertices.)




    My question is, if you want to find the value of q' don't you have to know the signs of some of the charges?
     
  2. jcsd
  3. Aug 29, 2011 #2
    I think you should determine the answer as a multiple of q. If you do that, you don't need to know the sign of q.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: E field problem, just a simple question
  1. E-Fields Question (Replies: 7)

  2. E-Fields Question (Replies: 0)

Loading...