A 1.50 m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 15.0V across its ends, while an ammeter measures the current through it. You observed that at room temperature ( 20° C) the ammeter reads 18. 5 A, while at 92.0° C it reads 17.2 A. a). Which of the following is its resistivity at 20° C?(p). [ Select] in N-m. b). Which of the following is the temperature coefficient of resistivity at 20° C for the material of the rod? ( Select] v in °C-1

A 1.50 m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 15.0V across its ends, while an ammeter measures the current through it. You observed that at room temperature ( 20° C) the ammeter reads 18. 5 A, while at 92.0° C it reads 17.2 A. a). Which of the following is its resistivity at 20° C?(p). [ Select] in N-m. b). Which of the following is the temperature coefficient of resistivity at 20° C for the material of the rod? ( Select] v in °C-1

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 89CP: Consider a resistor made from a hollow cylinder of carbon as shown below. The inner radius of the...

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