Point charge Q1 = 1 nC, Q2 is = 1 nC, Q3 = -2 nC located on the plane in the lattice sites to the cell in the form of a square with side a = 0.1 m. The lattice sites, which are referred to the charges set Ral vectors r1 = (a, a), r2 = (-a, a), r3 = (a, s),. The remaining nodes are no charges. Determine the dipole moment of the system of charges and their potential energy in an external electric field E = (0, -100) V / m.
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