Electric Field caused by two charges problem

AI Thread Summary
To calculate the electric field at point P due to two identical point charges, the relevant equation is E = k x Q / r^2, which should be applied to each charge separately. The distances from point P to each charge are given as 0.05 m and 0.12 m. Trigonometry will be necessary to combine the electric field vectors from each charge since they are at right angles to each other. The discussion highlights uncertainty about applying the equations and vector addition. Understanding how to determine the electric field at a point and perform vector addition is crucial for solving the problem.
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Homework Statement


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.

Electric Field Magnitude Problem.jpg



Homework Equations



Not sure which of these rules would apply. Also I suck at vectors
F = k x q1 x q2 / r^2

E = k x Q / r^2


The Attempt at a Solution



So I have created the diagram and I believe I have to use the second formula twice, along with some trigonometry, but I'm not sure.
 
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I feel you could make a better stab at figuring out which of those equations are likely to be relevant.
Do you know how to determine the field at a point due to a charge at some other point?
Do you know how to add vectors?
 

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