# A hollow metal cylinder has inner radius a, outer radius

## Problem 27.85 Chapter 27

Physics for Scientists and Engineers: A Strategic Approach, Standard Edition (Chs 1-36) | 4th Edition

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Physics for Scientists and Engineers: A Strategic Approach, Standard Edition (Chs 1-36) | 4th Edition

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Problem 27.85

A hollow metal cylinder has inner radius a, outer radius b, length L, and conductivity s. The current I is radially outward from the inner surface to the outer surface. a. Find an expression for the electric field strength inside the metal as a function of the radius r from the cylinders axis. b. Evaluate the electric field strength at the inner and outer surfaces of an iron cylinder if a = 1.0 cm, b = 2.5 cm, L = 10 cm, and I = 25 A.

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