Part 2 The temperature variation of resistance is given by R = Ro + Roa(T – To) where R is the resistance at temperature Tand Ro is the resistance at temperature To (often taken to be 0°C to 20°C repectively). (1) What is a? What are the units of a? (2) Solve for a algebraically. (3) Some thermometers use the resistance of a material to measure temperature. A resistance thermometer made from some material has a resistance of 64.3 Q at 22.5°C. When the thermometer is heated, the resistance becomes 139.1 Q. If a = 0.00498 (units omitted due to question (1)), what is the temperature of the material?

Part 2 The temperature variation of resistance is given by R = Ro + Roa(T – To) where R is the resistance at temperature Tand Ro is the resistance at temperature To (often taken to be 0°C to 20°C repectively). (1) What is a? What are the units of a? (2) Solve for a algebraically. (3) Some thermometers use the resistance of a material to measure temperature. A resistance thermometer made from some material has a resistance of 64.3 Q at 22.5°C. When the thermometer is heated, the resistance becomes 139.1 Q. If a = 0.00498 (units omitted due to question (1)), what is the temperature of the material?

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

Just part 2 :)

Part 1
Refer to "Real Batteries" in your textbook in addition to the lab manual.
(1) A battery has an emf of 9.0 V. After connecting a light bulb, you measure the terminal voltage of the
battery between points a and b to be 8.81 V and the current in the light bulb to be 752 mA. What is the
internal resistance of the battery?
(2) What is the resistance of the light bulb?
E=9V
I= 752
Vab=8. 8|
Vab= E- Ir
8,81-9-762xoor
a
r=0,252
g =762x103(0252+R)
R= 8.81 P 1000
752
R= I|.71 2
Part 2
The temperature variation of resistance is given by R = Ro + Roa(T – To) where R is the resistance at
temperature Tand Ro is the resistance at temperature To (often taken to be 0°C to 20°C repectively).
(1) What is a? What are the units of a?
(2) Solve for a algebraically.
(3) Some thermometers use the resistance of a material to measure temperature. A resistance
thermometer made from some material has a resistance of 64.3 Q at 22.5°C. When the thermometer is
heated, the resistance becomes 139.1 Q. If a = 0.00498 (units omitted due to question (1)), what is
the temperature of the material?

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