Check to see if this is done correct

  • Thread starter butz3
  • Start date
  • #1
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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
 

Answers and Replies

  • #2
Galileo
Science Advisor
Homework Helper
1,989
6
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.
 

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