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2) Phineas and Ferb decided to study resistivity by measuring the resistance of coils. They plotted the following resistance vs. length graph by measuring the resistance of several coils of varying lengths with a voltmeter. Use the slope of the graph to determine the resistivity of the material. Assume the diameter of the wire is 0.2 mm Answer: p=4.67 x 10-7 Om Rec 25 10 S D • Resistance vs. Length 05 3487514 Legh ( 25 (b) Dr. Doofenshmirtz had a 10 92 resistor made of the material in part a. The temperature of the room is 20 degrees Celsius. In order to take over the Tri-State area he needs a 15 2 resistor. Unfortunately he does not have a 15 2 resistor but he gets the genius idea to adjust the resistance of the resistor by changing the temperature. What temperature would be required to make the 10 2 resistor a 15 2 resistor? Assume Onicom = 4 x 10+/°C. Answer: T=1270 °C

2) Phineas and Ferb decided to study resistivity by measuring the resistance of coils. They plotted the following resistance vs. length graph by measuring the resistance of several coils of varying lengths with a voltmeter. Use the slope of the graph to determine the resistivity of the material. Assume the diameter of the wire is 0.2 mm Answer: p=4.67 x 10-7 Om Rec 25 10 S D • Resistance vs. Length 05 3487514 Legh ( 25 (b) Dr. Doofenshmirtz had a 10 92 resistor made of the material in part a. The temperature of the room is 20 degrees Celsius. In order to take over the Tri-State area he needs a 15 2 resistor. Unfortunately he does not have a 15 2 resistor but he gets the genius idea to adjust the resistance of the resistor by changing the temperature. What temperature would be required to make the 10 2 resistor a 15 2 resistor? Assume Onicom = 4 x 10+/°C. Answer: T=1270 °C

College Physics
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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practice test for exam please help part b
7:23 2) Phineas and Ferb decided to study resistivity by measuring the resistance of coils. They plotted the following resistance vs. length graph by measuring the resistance of several coils of varying lengths with a voltmeter. Use the slope of the graph to determine the resistivity of the material. Assume the diameter of the wire is 0.2 mm Answer: p=4.67 x 10-7 m 30 25 15 10 S Resistance vs. Length 7 14.8751.41 05 Length (m) 5G 17 1.5 2 × (b) Dr. Doofenshmirtz had a 10 92 resistor made of the material in part a. The temperature of the room is 20 degrees Celsius. In order to take over the Tri-State area he needs a 15 2 resistor. Unfortunately he does not have a 15 2 resistor but he gets the genius idea to adjust the resistance of the resistor by changing the temperature. What temperature would be required to make the 10 2 resistor a 15 92 resistor? Assume dichrome 4 x 104/°C. Answer: T-1270 °C
Transcribed Image Text:7:23 2) Phineas and Ferb decided to study resistivity by measuring the resistance of coils. They plotted the following resistance vs. length graph by measuring the resistance of several coils of varying lengths with a voltmeter. Use the slope of the graph to determine the resistivity of the material. Assume the diameter of the wire is 0.2 mm Answer: p=4.67 x 10-7 m 30 25 15 10 S Resistance vs. Length 7 14.8751.41 05 Length (m) 5G 17 1.5 2 × (b) Dr. Doofenshmirtz had a 10 92 resistor made of the material in part a. The temperature of the room is 20 degrees Celsius. In order to take over the Tri-State area he needs a 15 2 resistor. Unfortunately he does not have a 15 2 resistor but he gets the genius idea to adjust the resistance of the resistor by changing the temperature. What temperature would be required to make the 10 2 resistor a 15 92 resistor? Assume dichrome 4 x 104/°C. Answer: T-1270 °C
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