Question

Four electric charges + q, +q,-qand-q are placed at the corners of a square of side 2L. The electric potential at point A, midway between the two charges +q and +q, is :-
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Answer 1

Explanation:

Four charges +q, +q, -q, and -q are placed, respectively, at the corners A,B,C, and D of a square of side a, arranged in the given order. E and F are the midpoints of sides BC and CD, respectively, O is the center of square.