A rod of semiconducting material of length L 2 m and cross-sectional area A- 4.5 mm? lies along the x-axis between z0 and a- L The material obeys Ohm's law, and its resistivityvaries along the rod according to p= p(1where po4x 10 n m. The end of the rod at z=0 is at a potential V- 15 V greater than the end at z-LL2A) What is the total resistance, in units of fn, of the rod?

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rod of semiconducting material of length L- 2 m and cross-sectional area A- 4.5 mm? lies along the x-axis between z- 0 and z- L The material obeys Ohm's law, and its resistivity mries along the rod according to p Po(1- where po-4x 10 n-m. The end of the rod at z-0 is at a potential V, - 15 V greater than the end at z- L ) What is the total resistance, in units of 1, of the rod?

rod of semiconducting material of length L- 2 m and cross-sectional area A- 4.5 mm? lies along the x-axis between z- 0 and z- L The material obeys Ohm's law, and its resistivity mries along the rod according to p Po(1- where po-4x 10 n-m. The end of the rod at z-0 is at a potential V, - 15 V greater than the end at z- L ) What is the total resistance, in units of 1, of the rod?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

A rod of semiconducting material of length L 2 m and cross-sectional area A- 4.5 mm? lies along the x-axis between z0 and a- L The material obeys Ohm's law, and its resistivity
varies along the rod according to p= p(1
where po4x 10 n m. The end of the rod at z=0 is at a potential V- 15 V greater than the end at z-L
L2
A) What is the total resistance, in units of fn, of the rod?

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(a) A 35.1-m length of copper wire at 20.0°C has a radius of 0.23 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in the following table.) Resistivities and Temperature Coefficients of Resistivity for Various Materials (at 20°C) Material Resistivity(Ω · m) Temperature Coefficientof Resistivity [(°C)−1] Silver 1.59 ✕ 10−8 3.8 ✕ 10−3 Copper 1.7 ✕ 10−8 3.9 ✕ 10−3 Gold 2.44 ✕ 10−8 3.4 ✕ 10−3 Aluminum 2.82 ✕ 10−8 3.9 ✕ 10−3 Tungsten 5.6 ✕ 10−8 4.5 ✕ 10−3 Iron 10.0 ✕ 10−8 5.0 ✕ 10−3 Platinum 11 ✕ 10−8 3.92 ✕ 10−3 Lead 22 ✕ 10−8 3.9 ✕ 10−3 Nichromea 150 ✕ 10−8 0.4 ✕ 10−3 Carbon 3.5 ✕ 10−5 −0.5 ✕ 10−3 Germanium 0.46 −48 ✕ 10−3 Silicon 640 −75 ✕ 10−3 Glass 1010–1014 Hard rubber ≈1013 Sulfur 1015 Quartz (fused) 75 ✕ 1016 aA nickel–chromium alloy commonly used in heating elements. ??A(b) If the wire is heated to 36.0°C while the 7.0-V potential difference is…
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