A gold wire 2 mm in diameter and 100 m long is heated to 300°C.Note: p. = 2.44 x 10 -8 Q-m @ 20° C, a = 3.4 x 10 3 / °C @ 20° C%3D%3DWhat is the resistivity of the gold wire at 300°C?O 4.76 x 10-8Q-mO 2.44 x 1080-mO 2.32 x 10-8Q-mO 4.93 x 108 2-m

Given: The length (l) of the wire is 100 m. The diameter (d) of the wire is 2 mm. The resistivity of…

Answered: A gold wire 2 mm in diameter and 100 m…

A gold wire 2 mm in diameter and 100 m long is heated to 300°C. Note: Po = 2.44 x 10 -8 2-m @ 20° C, a = 3.4 x 10 -3/ °C @ 20° C %3D What is the resistivity of the gold wire at 300°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

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

A gold wire 2 mm in diameter and 100 m long is heated to 300°C.
Note: p. = 2.44 x 10 -8 Q-m @ 20° C, a = 3.4 x 10 3 / °C @ 20° C
%3D
%3D
What is the resistivity of the gold wire at 300°C?
O 4.76 x 10-8Q-m
O 2.44 x 1080-m
O 2.32 x 10-8Q-m
O 4.93 x 108 2-m

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