Electric potential energy

Electricity and Magnetism Level pending

Three equal point charges, each with charge $1.00 \text{ } \mu \text{C}$ , are placed at the vertices of an equilateral triangle whose sides are of length $0.7 \text{ m}.$ What is the approximate electric potential energy $U$ of the system?

Take as zero the potential energy of the three charges when they are infinitely far apart. Use $\varepsilon_{0} = 8.85×10^{-12}$ for the permittivity of free space.

3.85 \times 10^{-2} \text{ J}

7.70 \times 10^{-8} \text{ J}

7.70 \times 10^{-2} \text{ J}

3.85 \times 10^{-8} \text{ J}

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Electric potential energy

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