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There are 7 particles arranged as shown in the picture. The side length of the square is 0.04m. How much work is required to carry

There are 7 particles arranged as shown in the picture. The side length of the square is 0.04m. How much work is required to carry a +6e charge from an infinite distance to the center of the square?

-e -2e -3e +2e +3e +e +3e X

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