Question: A large brass washer has a 2-cm inside diameter, a 5-cm outside diameter, and is 0.5 cm thick. Its conductivity is = 1.5

A large brass washer has a 2-cm inside diameter, a 5-cm outside diameter, and is 0.5 cm thick. Its conductivity is σ = 1.5 × 10⁷ S/m. The washer is cut in half along a diameter, and a voltage is applied between the two rectangular faces of one part. The resultant electric field in the interior of the half-washer is E = (0.5/ρ) a_ϕ V/m in cylindrical coordinates, where the z axis is the axis of the washer.

(a) What potential difference exists between the two rectangular faces?

(b) What total current is flowing?

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