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 0.350m . 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 1.00?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.350m . 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

Potential energy of system=-kq1q2/r1-kq1q3/r3-kq2q3/r2

k=1/4*pi*e0=9*10^9

therefore potential energy=-k(1*1*10^-12*3/0.35)=-0.07714 Nm

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