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Answer on Electric Circuits Question for Eliud Serrano

Question #17621
The electric potential at the origin of an xy-coordinate system is 40 V. A -8.0-μC charge is brought from x = +∞ to that point. What is the electric potential energy of this charge at the origin?


A) 8.0 μJ

B) 40 μJ

C) -3.2 × 10-4 J

D) -40 μJ

E) 3.2 × 10-4 J
Expert's answer
Potential energy Ep of that charge is
Ep = (40 V)*(-8.0-μC) = -3.2 × 10-4 J

correct answer is C)

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