Magnitude and Direction of Electric Field

  • Thread starter bwilhelm
  • Start date
  • #1
9
0

Homework Statement


Two point charges are placed on the y-axis. One is +3.0 C and located at position (0, 2 m), the other is -2.0 C and located at the origin. Use the diagram to find the magnitude and direction of the electric field and the force on a +1.0 x 10-9 C test charge placed in the following locations.
a. (0, 1.0 m)
b. (0, -2.0 m)
c. (1.0m, 0)

Homework Equations



E= kq/(r^2)

The Attempt at a Solution


So for part a:
F= (K(3x10^-6)/(1^2) + K(2x10-6)/(1^2))
E= F/(test charge)

Same for part b, but the radius is different.
My question is how do I get part C?
I calculated the force between the -2uc charge and point C, but how do I get the force between the +3uc charge and point C?

Do I need to find the angle?

Homework Statement





Homework Equations





The Attempt at a Solution

 

Attachments

  • diagram.jpg
    diagram.jpg
    3.4 KB · Views: 386

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
8
Find the distance between points ( 0, 2) and (1,0).
Find field at (1,0) due to + 3μC and - 2μC.
Resolve the field due to +3μC into x and y components.
Find the net x component and find the resultant with y component.
 
  • #3
9
0
Find the distance between points ( 0, 2) and (1,0).
Find field at (1,0) due to + 3μC and - 2μC.
Resolve the field due to +3μC into x and y components.
Find the net x component and find the resultant with y component.

Thank you for the reply, i'll try this out tomorrow.
 

Related Threads on Magnitude and Direction of Electric Field

Replies
5
Views
6K
Replies
5
Views
2K
Replies
5
Views
3K
Replies
11
Views
5K
Replies
1
Views
1K
Replies
11
Views
13K
Replies
4
Views
3K
Replies
1
Views
2K
Replies
5
Views
6K
Replies
1
Views
4K
Top