Question: Where would you place a third small object with the same charge so that the electric field is zero at the corner of the square

Where would you place a third small object with the same charge so that the electric field is zero at the corner of the square labeled A?
Two tiny objects with equal charges of 7.00 Î¼C are placed at the two lower corners of a square with sides of 0.300 m, as shown.

A B

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