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Two metal balls of the same radius a ar...

Two metal balls of the same radius a are located in a homogeneous poorly conducting meium with resistivity `rho`. Find the resistance of the medium between the balls provided that the separated between them is much greater than the radius of the ball.
Strategy `:` Let us mentally impart the charge `+q` and `=q` to the balls respectively. The electric field strength at the surface of a ball will be determined only by its own charge and the cahrge can be considered to be uniformly distributed over the surface, because the other ball is at infinite distance.

Text Solution

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`R = (P)/(2pia)`
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