Electric Field caused by two charges problem

jeudi 28 août 2014

1. The problem statement, all variables and given/known data

Two identical point charges, q1 = +2.5 x 10-6 C and q2 = +2.5 x 10-6 C, are placed as shown in the diagram below. Point P is a distance 0.05 m from q1 and 0.12 m from q2, such that the angle at P is 90 degrees. Calculate the magnitude of the Electric field E at point P.



Attachment 72529





2. Relevant equations



Not sure which of these rules would apply.

F = k x q1 x q2 / r^2



E = F / q



E = k x Q / r^2



F = k x I1 x I2 x L / d





3. The attempt at a solution



So I have created the diagram and I believe I have to use the third formula twice, along with some trigonometry, but I'm not sure.




Attached Images





File Type: jpg Electric Field Magnitude Problem.jpg (6.4 KB)







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