Question

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for an ideal conductor; (D) All; (E) None.
A conductor has a surface charge density o C/m². The force per unit area on the surface is
(A) 0; (B) σ²/2 80 N/m²; (C) o²/ɛo N/m²; (D) 20² /ɛo N/m²; (E) None.