Question

A hollow tube with a rectangular cross-section has external dimensions of 0.5 in by 1 in and a wall thickness of 0.05 in. Assume that the material is brass, for which the conductivity is

1 = 1.5×107 S/m. A DC current of 200 A is flowing through the outer part of the tube.

Part a

Calculate the potential difference across an L = 1 m length of the tube in the z direction.

Part b

Calculate the potential difference across the same tube that is filled with a second conducting material with conductivity 2 = 1.5×105 S/m.

Readin Chapter 6, pp. 218-274 Problems 1 A hollow tube with a wall thickness of 0.05 in. Assume that the material is brass, for which the conductivity is σι = 1.5× 107 sim. A DC current of 200 A is flowing through the outer part of the tube. Part a Calculate the potential difference across an L 1 m length of the tube in the : direction. has extemal dimensions of O.S in by I in and a Part b Calculate the potential difference across the same tube that is filled with a second conducting material with conductivity ơ.-1.5x 105 S/m. 05 in (Left) Device for Part a Right) Device for Part b. Page 1 of 3

Answer 1

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(p b .心わUろ22.5 S-0. 000 23 225% 二 0.ooOC) 9 o 3 2 2 y m 3 s 36 tHe

rnn 4. 15xn x00 232 16 丁