2. Charge is distributed uniformly over a large square plane of side l, as shown in...

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2. Charge is distributed uniformly over a large square plane of side l, as shown in the figure. The charge per unit area (C/m) is . Determine the electric field at a point P a distance z above the center of the plane, in the limit . [Hint: Divide the plane into long narrow strips of width dy,] dE dE dE, P + x + + + X + x + x f. 4 2. Charge is distributed uniformly over a large square plane of side l, as shown in the figure. The charge per unit area (C/m) is . Determine the electric field at a point P a distance z above the center of the plane, in the limit . [Hint: Divide the plane into long narrow strips of width dy,] dE dE dE, P + x + + + X + x + x f. 4