Three equal point charges, each with charge 1.40 ? C , are placed at the vertice

Question

Three equal point charges, each with charge 1.40?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.650m . 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 = 8.85 Three equal point charges, each with charge 1.40?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.650m . 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 = 8.85

Explanation / Answer

Enet = E12 + E23 + E31

Energy = kq1q2/r

Enet = 9*10^9*1.4*1.4*10^-12(1/0.65 + 1/0.65 + 1/0.65)

Energy = 0.08141 J

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