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 ] 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 ] in °C-1

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter29: Direct Current (dc) Circuits

Section: Chapter Questions

Problem 19PQ

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