• Support PF! Buy your school textbooks, materials and every day products Here!

What is the magnitude and direction of the electric field

  • Thread starter schern42
  • Start date
  • #1
5
0
What is the magnitude and direction of the electric field at a point midway between a -7.0 µC and a +6.0 µC charge 2.5 cm apart? Assume no other charges are nearby.

I thought I was approaching the problem correctly, but I'm not getting the right answer. I used the equation:
E = k(Q1 + Q2)/L^2
 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
26,258
618
Hard to say what went wrong. What's L?
 
  • #3
5
0
L is 2.5 cm
 
  • #4
Dick
Science Advisor
Homework Helper
26,258
618
How far is the point midway between the charges from each charge? That's what should go into your E expression.
 
  • #5
378
2
drawin it all might help, as it always does =P
 
  • #6
hage567
Homework Helper
1,509
2
Make sure all your units are consistent too.
 
  • #7
Dick
Science Advisor
Homework Helper
26,258
618
It's better than plugging numbers randomly into formulas just because they happen to be stated in the problem.
 

Related Threads for: What is the magnitude and direction of the electric field

Replies
4
Views
4K
Replies
23
Views
556
Replies
2
Views
4K
Replies
3
Views
1K
Replies
2
Views
441
Replies
4
Views
507
Top