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Point Charges

  • Thread starter Zvaigzdute
  • Start date
  • #1
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Homework Statement



A point charge of -7e-6 C is located at x = 3 m, y = -2 m. A second point charge of 12e-6 C is located at x = 1 m, y = 3 m.

Homework Equations





The Attempt at a Solution



Dq1 = sqrt(20)
Dq2 = sqrt (13)

E1 + E2= k(-7e-6)/20 + k(-7e-6)/20 = 11444.96 N/C

What am I doing wrong?

And how to find the direction ?

Homework Statement





Homework Equations





The Attempt at a Solution


Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Hi *! :smile:

(have a square-root: √ and try using the X2 icon just above the Reply box :wink:)
A point charge of -7e-6 C is located at x = 3 m, y = -2 m. A second point charge of 12e-6 C is located at x = 1 m, y = 3 m.
E1 + E2= k(-7e-6)/20 + k(-7e-6)/20 = 11444.96 N/C
(I assume you're trying to find the field at (-1,0)?)

i] One of those should be +12. :rolleyes:

ii] You must add these as vectors, so use x and y components. :wink:
 
  • #3
1,137
0
What is the question?
 

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