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A charge +Q is located near four equal positive charges. These four charges lie on a straight line and are separated by distance d as shown in the figure. The charge +Q is located directly below the second positive charge in the line.Electric potential energies of the four charges because of the presence of charge +Q are related as

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$(C) E^4_p > E^2_p = E^3_p > E^2 _p$
Hence C is the correct answer.
answered Jun 13, 2014 by meena.p

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