Three equal point charges, each with charge 1.90 ? C , are placed at the vertice

Question

Three equal point charges, each with charge 1.90?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.250m . 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 1.90?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.250m . 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

U= 3*(k q^2/r)
=3*(9x10^9x1.9x1.9x10^(-12) /0.25)
=0.3896 J

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