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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Question
![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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F01486703-2d80-4b89-af90-f8545924462e%2F00fae52e-ce36-4324-88f8-96b12ce6a921%2F8n66j_processed.png&w=3840&q=75)
Transcribed Image Text: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
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