A gold resistance thermometer has a resistance Ro = 70.0Ω at To = 20°C. The temperature coefficient of resistance is 3.4x10-3°C. The thermometer is immersed in a container with melting tin, at which point R increases to 112.5Ω. What is the melting point of tin?

A gold resistance thermometer has a resistance Ro = 70.0Ω at To = 20°C. The temperature coefficient of resistance is 3.4x10-3°C. The thermometer is immersed in a container with melting tin, at which point R increases to 112.5Ω. What is the melting point of tin?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 57PQ

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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 resistance thermometer has a resistance R_o = 70.0Ω at T_o = 20°C. The temperature coefficient of resistance is 3.4x10^-3°C. The thermometer is immersed in a container with melting tin, at which point R increases to 112.5Ω. What is the melting point of tin?

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