Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. Plate A has a uniform, positive charge density of magnitude σ_A. Plate B has a uniform, negative charge density of magnitude σ_B. What is the magnitude of the electric field half-way between the two plates?

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The Answer of Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. Plate A has a uniform, positive charge density of magnitude σ_A. Plate B has a uniform, negative charge density of magnitude σ_B. What is the magnitude of the electric field half-way between the two plates?

Two Large, Flat, Horizontally Oriented Plates Are Parallel to Each