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6. Four point charges, each of the same magnitude, with varying signs are arranged at the corners of a square as
shown. Which of the arrows labeled A, B, C, and D gives the correct direction of the net force that acts on
the charge at the upper right corner?
+ Q
-Q
с
-Q
+ Q
A) A
B) B
C) C
D) D
E) The net force on that charge is zero,
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