Potential Energy: 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 = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 27 J
B. 13.5 kJ
C. 54 J
D. 13.5 J
Answer: A
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