Potential Energy: An electric dipole with ±5.0 ?C point charges is positioned so that the positive charge is 1.0 mm to the right of the origin and the negative charge is at the origin. How much work does it take to bring a 3.0-?C point charge from very far away to the point x = 3.0 mm, y = 0.0 mm? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 23 J
B. 110 J
C. 19 J
D. 49 J
Answer: A
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