The electric field at a point is given by:
, where is Coulomb's constant, q is charge., and r is the distance from the point to the charge.
The electric field at point P due to charge 1 (-Q).
The figure(Figure 1) shows three charges at the corners of a square.
Write the electric field at point P in component form. Assume that x-axis is horizontal and points to the right, and the y-axis points upward.
Express your answer in terms of the variables Q, L, unit vectors i^, j^, and appropriate constants.
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