Question: Two long, straight copper pipes, each of radius a, are held a distance 2d apart (see Fig. 7.49). One is at potential V0, the other

Two long, straight copper pipes, each of radius a, are held a distance 2d apart (see Fig. 7.49). One is at potential V0, the other at ?? V0. The space surrounding the pipes is filled with weakly conducting material of conductivity a. Find the current, per unit length, which flows from one pipe to the other.

-V O 2d +V

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