A +5.0-nC charge is at the point (0.00 m, 0.00 m) and a -2.0-nC charge is at (3.0 m, 0.00 m). What work is required to bring a 1.0-nC charge from very far away to point (0.00 m, 4.0 m)? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A) 15 nJ
B) 3.6 nJ
C) 11 nJ
D) 7.7 nJ
D
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