Potential Energy: A +3.0-µC point charge is initially extremely far from a positive point charge Q. You find that it takes 41 J of work to bring the +3.0-µC charge to the point x = 3.0 mm, y = 0.0 mm and the point charge Q to the point x = -3.0 mm, y = 0.00 mm. What is Q? (k = …)
A. 55 nC
B. 9.1 µC
C. 4.6 µC
D. 27 pC
Answer: B
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