1. The problem statement:(adsbygoogle = window.adsbygoogle || []).push({});

Four point charges are placed at the corners of a square. Starting from the top left corner and working around in the clockwise direction, their values are as follows; 4 micro coulombs, 1 micro coulomb, 4 micro coulombs, and negative 3 micro coulombs. Each side of the square has length 2.0 m. Determine the magnitude of the electric field at point "P" at the center of the square.

2. Relevant equations

Electric Field: E= F/q

Force: F= q1 x q2/r^2

3. The attempt at a solution

I not sure where to begin with this problem. I believe that the first and third point charges would cancel each other out. Based on what I know, I need a test charge at point "P" and I need to know the magnitude of that test charge. Then I can apply coulombs law by using the force equation above. Once I know force, I can plug that value into the electric field equation which should answer the question. Is there another way to solve this problem without a test charge?

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

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Magnitude of Electric Field Question

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