IE ... As a wire is stretched out so that its length increases, its cross-sectional area decreases, while the total volume of the wire remains constant. (a) Will the resistance after the stretch be (1) greater than, (2) the same as, or (3) less than that before the stretch? (b) A 1.0-m length of copper wire with a 2.0-mm diameter is stretched out; its length increases by 25% while its cross- sectional area decreases, but remains uniform. Compute the resistance ratio (final to initial).
IE ... As a wire is stretched out so that its length increases, its cross-sectional area decreases, while the total volume of the wire remains constant. (a) Will the resistance after the stretch be (1) greater than, (2) the same as, or (3) less than that before the stretch? (b) A 1.0-m length of copper wire with a 2.0-mm diameter is stretched out; its length increases by 25% while its cross- sectional area decreases, but remains uniform. Compute the resistance ratio (final to initial).
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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I need help solving this problem espeically part b. By the way the resistivity (p) for copper is 1.70x10^-8 ohm m.
Transcribed Image Text:IE ... As a wire is stretched out so that its length
increases, its cross-sectional area decreases, while the
total volume of the wire remains constant. (a) Will the
resistance after the stretch be (1) greater than, (2) the
same as, or (3) less than that before the stretch? (b) A
1.0-m length of copper wire with a 2.0-mm diameter is
stretched out; its length increases by 25% while its cross-
sectional area decreases, but remains uniform. Compute
the resistance ratio (final to initial).
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