- #1
Rijad Hadzic
- 321
- 20
Homework Statement
Given two charged particles:
1) 5x10^-9 C, (-.03 m, 0 m)
2) -20x10^-9 C (.04 m, .02 m)
find the electric field at the origin.
Homework Equations
F = (kQq)/r^2
E = (kQ)/r^2
The Attempt at a Solution
So I know since 1)'s charge is plus, its field vector is
[itex] ( (8.99x10^{-9}) (Q) ) / (.03)^2 [/itex] i hat, meaning its going to the right
I use arctan to find the angle between the origin and 2), it is 26.57 deg, and pathagorean theorem to find the distance r to be .045m
since 2) is - charged, its electric field is going away from the origin at 26.57 degrees.
[itex] ( (8.99x10^{-9}) (Q) ) / (.045)^2 [/itex]
Now I can break it down into components, but how am I suppose to find Q, the charge of the origin?
If they gave me a value for the electric force between the origin and one of the particles I can find Q, but with this information I don't see any way I can find it?
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