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Finding an unknown charge

by kerbyjonsonjr
Tags: charges, coulomb's law
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kerbyjonsonjr
#1
Sep8-11, 02:21 PM
P: 34
1. The problem statement, all variables and given/known data

A right triangle is shown below. The charge on the right is unknown, but the electric field shown is only in the x direction.
a. What is the unknown charge?
b. What is the magnitude of the electric field?



2. Relevant equations



3. The attempt at a solution
I have no idea how to start this problem. I have just been staring at it for 20 minutes. I would really appreciate any help.
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution
Attached Thumbnails
unknown charge triangle.jpg  
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lachy89
#2
Sep9-11, 02:44 AM
P: 18
You have not posted any relevant equations. I think a good starting point would be looking for an equation for the electric field due to a point charge.

As you have explained the electric field is in the -x direction. Would this mean that there is no y component at the point in question?


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