9 Figure 26-22 gives the drift speed Va vaof conduction electrons in a copper wire versus position x along the wire. The wire consists of three sections that differ in radius. Rank the three A sections according to the following в |с | Figure 26-22 Question 9. quantities, greatest first: (a) radius, (b) number of conduction electrons per cubic meter, (c) magnitude of electric field, (d) conductivity.

9 Figure 26-22 gives the drift speed Va vaof conduction electrons in a copper wire versus position x along the wire. The wire consists of three sections that differ in radius. Rank the three A sections according to the following в |с | Figure 26-22 Question 9. quantities, greatest first: (a) radius, (b) number of conduction electrons per cubic meter, (c) magnitude of electric field, (d) conductivity.

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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3. Assume that there is a region with cylindrical symmetry in which the conductivity is given by o = 1.5e- 150p kS/m. An electric field of 30 k V/m is present. a) Find J: Use J = o E = 45e - 150p k kA/m2 b) Find the total current crossing the surface p < p0, z = 0, all ø
Problem 3: A 1.2 g wire has a density of 2.7 g/cm3 and a resistivity of 2.7 × 10−8 Ωm. The wire has a resistance of 15 Ω. a) How long is the wire? b) The wire is made up of atoms with valence 1 and molar mass 26.98 g/mol. What is the drift speed of the electrons when there is a voltage drop of 30 V across the wire?
Question 20 A 8 A.h lithium-ion cell is charged at 2C (units of C-rate are h¹) from 0% state of charge to 67% state of charge. The cell has a constant internal resistance of 0.01 Q and reversible (entropic heating) is assumed to be negligible. How much heat energy is generated. In the lithium-ion cell as a by-product of this charge process? Give your answer as a positive value in joules (), to the nearest integer.
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Copper wire has a resistivity o = 1.7 x 10-8 22m when at 20°C and it has a temperature coefficient a = 3.9 × 10-3 K-1. A solid cylinder of copper of length L = 85 cm and diameter D = 1.5 mm has one end held at T₁ = 15°C and the other end is held at T2 = 230°C. The temperature increases linearly between the two ends of the cylinder. T₁ dx R= L T₂ Part (a) Consider a thin slice of the copper cylinder of thickness dx that is located a distance x from the left end of the cylinder. Write an equation for the temperature of this slice in terms of the variables x, L, T1, and T2. Part (b) Determine the total resistance in milliohms.