Question: The diagram shows a wire connected to the Earth (conductivity E ) through a perfectly conducting sphere of radius a which is half-buried in

The diagram shows a wire connected to the Earth (conductivity σ_E) through a perfectly conducting sphere of radius a which is half-buried in the Earth. The layer of earth immediately adjacent to the sphere with thickness b − a has conductivity σ₂. Find the resistance between the end of the wire and a point deep within the Earth (taken as infinitely large).

TE a b -02

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