Two particles with charges Q and -Q are fixed at the vertices of an equilateral triangle with sides of length a. If k = 1/4 0, the work required to move a particle with a charge q from the other vertex to the center of the line joining the fixed charges is: 
A) 0
B) kQq/a
C) kQq/a2
D) 2kQq/a
E)
Correct Answer:
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