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Two particles with equal and opposite point charges, (+ q) and (- q) are located on the x axis at x = – a, and at x = + a as shown in the figure. (Write your answers in terms of k- Coulomb constant, q and a. Note that the distance between the charges is 2a).
a-) Write the magnitude and direction of the electric force (F) acting on the particle at x = -a. b-) How much energy is needed to increase the separation of the charges from 2a to 3a?


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