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Unformatted text preview: field at the origin. First, let us consider the electric field from each charge in turn. Write down the magnitude of E 1 (electric field created by charge q 1 ), and draw vector E 1 in the figure. (Where should the vector start from? In which direction does it point?) Do the same for electric fields E 2 and E 3 . Now we want to start adding electric fields. Are there any symmetries that are going to help us? (answer is yes) Which two electric fields should we add together first? (no further calculations needed). Now you should be able to see another symmetry that will help you. Do you see that one of the x- and y-components of the total electric field will be zero. Which one?...
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