Three equal point charges, each with charge 1.00 ? C , are placed at the vertice

Question

Three equal point charges, each with charge 1.00?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.700m . What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.) Use ?0 = 8.8510?12C2N?m2 for the permittivity of free space. Three equal point charges, each with charge 1.00?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.700m . What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.) Use ?0 = 8.8510?12C2N?m2 for the permittivity of free space.

Explanation / Answer

sum over all three pairs

so U = 3 k q Q/r = 3*9.0E9*1.0E-6^2/0.7=3.86E-2 J

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