FUNDAMENTALS OF PHYSICS - EXTENDED
FUNDAMENTALS OF PHYSICS - EXTENDED
12th Edition
ISBN: 9781119773511
Author: Halliday
Publisher: WILEY
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Chapter 27, Problem 25P

SSM Nine copper wires of length l and diameter d are connected in parallel to form a single composite conductor of resistance R. What must be the diameter D of a single copper wire of length l if it is to have the same resistance?

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A wire of initial length L0 and radius r0 has a measured resistance of 1.0 Ω. The wire is drawn under tensile stress to a new uniform radius of r ═ 0.25r0. What is the new resistance of the wire?
Two identical resistors of R0 = 98 Ω are connected head-to-tail. Express the resistance R0 of one of the resistors in terms of the resistivity ρ, length L, and the cross section area A.  Calculate the total resistance R of the two resistors in ohms.
Two identical resistors of R0 = 71 Ω are connected head-to-tail. (a)  Express the resistance R0 of one of the resistors in terms of the resistivity ρ, length L, and the cross section area A.  (b)  Calculate the total resistance R of the two resistors in ohms.

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FUNDAMENTALS OF PHYSICS - EXTENDED

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Ohm's law Explained; Author: ALL ABOUT ELECTRONICS;https://www.youtube.com/watch?v=PV8CMZZKrB4;License: Standard YouTube License, CC-BY