The diagram below shows the arrangement of three small spheres, 4, B. and C, having charges of 3q, q, and q, respectively. Spheres A and C are located distance r from sphere B. A -------------- B ------------- C r r 3q q q Compared to the magnitude of the electrostatic force exerted by sphere B on sphere C, the magnitude of the electrostatic force exerted by sphere A on sphere C is (1) the same (2) twice as great (3) 3/4 as great (4) 3/2 as great

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