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As per this diagram a point charge +q is placed at the origin O. Work done in taking another point charge -Q from the point A [co-ordinates (0, a) ] to another point [co-ordinates (a, 0)] along the straight path AB is:​

As per this diagram a point charge q is placed at the origin O Work done in taking another point charge Q from the point A coordinates 0 a to another point coor class=


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