Part A Three equal point charges, each with charge 1.75 ? C , are placed at the

Question

Part A Three equal point charges, each with charge 1.75?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.550m . 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 Part A Three equal point charges, each with charge 1.75?C , are placed at the vertices of an equilateral triangle whose sides are of length 0.550m . 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 Q1Q2, E1 = 9 * 10^9 * 1.75 *1.75 * 10^-12 / 0.550 = 50.114 * 10^-3 J
Similarly, E2 = 50.114 * 10^-3 J
and, E3 = 50.114 * 10^-3 J

Total potential energy, U = E1 + E2 + E3 = 150.34 * 10^-3 Joules

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