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Four charged particles are at the corners of a square of side a, as shown in the figure below. (A = 4, B = 2, C = 2.) (a) Determine the magnitude and direction of the electric field at the location of charge q. (Use k_e for the Coulomb constant and q and a as necessary.) Magnitude Direction ° (counterclockwise from the horizontal) (b) What is the total electric force exerted on q? Magnitude Direction ° (counterclockwise from the horizontal)

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