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Two very large, nonconducting plastic sheets, each 10.0 cm thick, carry uniform charge densities σ1, σ2, σ3, and σ4 on their surfaces (Fig. E22.30). These surface charge densities have the values σ1 = −6.00 μC/m2, σ2 = +5.00 μC/m2, σ3 = +2.00 μC/m2, and σ4 = +4.00 μC/m2. Use Gauss’s law to find the magnitude and direction of the electric field at the following points, far from the edges of these sheets: (a) point A, 5.00 cm from the left face of the left-hand sheet; (b) point B, 1.25 cm from the inner surface of the right-hand sheet; (c) point C, in the middle I of the right-hand sheet.
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