Four point charges q,q,-q,-q are held fixed at the corners of square ABCD with diagonals of length 2l. Determine the field intensity at a point distance x from the plane of the square on its axis.
Four point charges q,q,-q,-q are held fixed at the corners of square ABCD with diagonals of length 2l. Determine the field intensity at a point distance x from the plane of the square on its axis.