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!

Check to see if this is done correct

  1. Oct 31, 2004 #1
    i have this question its worth 12 marks so i'm just wondering if i did it properly. the question is "the following diagram shows two charged objects, 1 and 2, and their positions relative to point p"
    object 1 ----------------object 2---------------p
    q1=+6.00microC q2=-3.00microC
    distance between q1 and q2 is 2.00m and distance between q2 and p is 1.00m
    "calculate the magnitude and direction of the resultant electric field at point p.

    so this is what i did

    [E1]=kq1/r (8.99x10^9 N.m2/C2)(6.00x10^-6C)/(2.00m)^2
    =13485N/C
    [E2]=kq2/r (8.99x10^9 N.m2/C2)(3.00x10^-6C)/1.00m)^2
    =26970N/C

    than i went [Ep]=[E1+E2]
    13485N/C+26970N/C
    =40455N/C
    so my final answer is 4.05x10^4N/C to the right.

    is this correct. thanks
     
  2. jcsd
  3. Oct 31, 2004 #2

    Galileo

    User Avatar
    Science Advisor
    Homework Helper

    Almost. Note though, that the distance from q1 to p is
    'the distance from q1 to q2'+'the distance from q2 to p'.

    Also, the q2 is negatively charged. Don't forget that minus sign.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?