A Small 40-µC Charge and a Small 1

Multiple Choice

A small 4.0-µC charge and a small 1.5-µC charge are initially very far apart.How much work does it take to bring them to a final configuration in which the 4.0-µC charge is at the point x = 1.0 mm,y = 1.0 mm,and the 1.5-µC charge is at the point x = 1.0 mm,y = 3.0 mm? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

A) 27 J
B) 13.5 kJ
C) 54 J
D) 13.5 J