MHT CET Physics question

A current flows along the length of an infinitely long, straight and thin-walled pipe. Then [IIT JEE 1993, AIEEE 2007, Similar KCET 2009]

Answer: (B)

Solution

By Ampere's law, an amperian loop inside the pipe encloses no current, so at every interior point; hence

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Question ID VK-078681