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 field strength from x=-a to x = a

  1. Sep 7, 2015 #1
    1. The problem statement, all variables and given/known data
    I attached a file.

    Numbers 10 and 12.

    2. Relevant equations

    kQq/r, kQq/r^2

    3. The attempt at a solution

    I am confused about this problem. Shouldn't the electric field strength be 0 when x = 0? The charges are opposite and adding two opposite vectors with equal magnitude should be 0 right? So how come the answer says that the electric field strength is the greatest at x = 0 then? Thank you.

    Attached Files:

  2. jcsd
  3. Sep 7, 2015 #2
    They are in opposite positions on the y axis,so the vectors of the electric fields point in the same direction.They both point to the negative charge.
  4. Sep 7, 2015 #3
    Wow... Thank you and now I feel embarrassed for asking this question! I can't believe I overlooked this. Thank you.
  5. Sep 7, 2015 #4
    Just be a little more patient with physics problems,however simple or confusing they might be.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted