A long, conducting copper pipe has inner radius a = 6.7 mm and outer radius b = 8.0 mm. The pipe has zero net charge. A thin wire is threaded through the pipe, along its central axis and without making contact with the pipe. The wire has linear charge density A = +5.9 µC/m. What is the induced surface charge density o on the inner surface of the pipe? For the limits check, investigate what happens to o if the pipe becomes extremely narrow inside (a →0).

A long, conducting copper pipe has inner radius a = 6.7 mm and outer radius b = 8.0 mm. The pipe has zero net charge. A thin wire is threaded through the pipe, along its central axis and without making contact with the pipe. The wire has linear charge density A = +5.9 µC/m. What is the induced surface charge density o on the inner surface of the pipe? For the limits check, investigate what happens to o if the pipe becomes extremely narrow inside (a →0).