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A thick slab with charge density ρ=+2.5mc/m3 and height 2*0.3mm=0.6mm is parallel to a thin insulating...

A thick slab with charge density ρ=+2.5mc/m3 and height 2*0.3mm=0.6mm is parallel to a thin insulating sheet with charge density σ=-3mc/m2. If the two sheets are 0.2cm apart, what is the electric field half way between the sheet and the slab? What is the electric field 0.05cm from the thin sheet?

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