Two electric charges QA = + 1.0 ?C and QB= - 2.0 ?C are located 0.50 m apart. How much work is needed to move the charges apart and double the distance between them?
A)
-36 × 10-3J
B)
+18 × 10-3
C)
0
D)
+36 × 10-3
E)
-18 × 10-3
B
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