How Much Energy Is Necessary to Place Three +2

question 74

Multiple Choice

How much energy is necessary to place three +2.0-µC point charges at the vertices of an equilateral triangle of side 2.0 cm if they started out extremely far away? (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²)

• A)4.5 J
• B)5.4 J
• C)6.7 J
• D)7.6 J

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