The resistivity of a metal increases slightly with increased temperature. This can be expressed as p=po [1+ a(T-To)], where To is a reference temperature, usually 20° C, and a is the temperature coefficient of resistivity. For copper, a=3.9x 10-3 °C-¹. Suppose a long, thin copper wire has a resistance of 0.25 at 20°C. ▼ Part A At what temperature, in °C, will its resistance be 0.25 ? T = Submit VE ΑΣΦ Request Answer ? °C

The resistivity of a metal increases slightly with increased temperature. This can be expressed as p=po [1+ a(T-To)], where To is a reference temperature, usually 20° C, and a is the temperature coefficient of resistivity. For copper, a=3.9x 10-3 °C-¹. Suppose a long, thin copper wire has a resistance of 0.25 at 20°C. ▼ Part A At what temperature, in °C, will its resistance be 0.25 ? T = Submit VE ΑΣΦ Request Answer ? °C

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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Concept explainers

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.

Question

The resistivity of a metal increases slightly with
increased temperature. This can be expressed as
p=po [1+ a(T-To)], where To is a reference
temperature, usually 20°C, and a is the
temperature coefficient of resistivity. For copper,
a=3.9x 10-3 °C-1. Suppose a long, thin copper
wire has a resistance of 0.25 at 20°C.
Part A
At what temperature, in °C, will its resistance be 0.25 ?
T=
Submit
5 ΑΣΦ
V
Request Answer
?
°C

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