In this problem, we are dealing with electric fields due to point charges.
In the figure the four particles are fixed in place and have charges q1 = q2 = 3e, q3 = 2e and q4 = -9e. Distance d = 2.17 µm. What is the magnitude of net electric field at point P due to the particles?
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Based on our data, we think this problem is relevant for Professor Harrer's class at UB.