Problem 5.20 18 (a) Find the density p of mobile charges in a piece of copper, assuming each atom contributes one free electron. [Look up the necessary physical constants.] (b) Calculate the average electron velocity in a copper wire 1 mm in diameter, carrying a current of 1 A. [Note: This is literally a snail's pace. How, then, can you carry on a long distance telephone conversation?] An apparent detection (B. Cabrera, Phys. Rev. Lett. 48, 1378 (1982)) has never been reproduced- and not for want of trying. For a delightful brief history of ideas about magnetism, see Chapter 1 in D. C. Mattis, The Theory of Magnetism (New York: Harper & Row, 1965). 5.4 Magnetic Vector Potential (c) What is the force of attraction between two such wires, 1 cm apart? 243 (d) If you could somehow remove the stationary positive charges, what would the electrical repulsion force be? How many times greater than the magnetic force is it?

Problem 5.20 18 (a) Find the density p of mobile charges in a piece of copper, assuming each atom contributes one free electron. [Look up the necessary physical constants.] (b) Calculate the average electron velocity in a copper wire 1 mm in diameter, carrying a current of 1 A. [Note: This is literally a snail's pace. How, then, can you carry on a long distance telephone conversation?] An apparent detection (B. Cabrera, Phys. Rev. Lett. 48, 1378 (1982)) has never been reproduced- and not for want of trying. For a delightful brief history of ideas about magnetism, see Chapter 1 in D. C. Mattis, The Theory of Magnetism (New York: Harper & Row, 1965). 5.4 Magnetic Vector Potential (c) What is the force of attraction between two such wires, 1 cm apart? 243 (d) If you could somehow remove the stationary positive charges, what would the electrical repulsion force be? How many times greater than the magnetic force is it?

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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