(Answered) Four charged particles are at the corners of a square of

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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 = 5, C = 3.)

http://s3.amazonaws.com/answer-board-image/13a05863-4792-472c-abe7-81ff59497c2c.gif

(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

(b) What is the total electric force exerted on q?

Magnitude

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