# Physics

## A Physics Puzzle from the Kitchen (sort of)

Submitted by ibuder on Tue, 11/05/2013 - 19:42

Two perfect conducting spheres are immersed in a fluid with electrical conductivity σ = 5 x 10^{-2} S/m. The spheres have radius r = 1 mm and are maintained a distance R = 1 m apart. A potential difference of V = 220 V is maintained between the two spheres. The fluid extends to infinity. Calculate the net current flowing between the spheres. (If you've been paying attention, you've noticed that this situation violates charge continuity.

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