A 1.50-m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 15.0 V across its ends, while an ammeter measures the current through it. We observe that at room temperature (20.0°C) the ammeter reads 18.5 A, while 3. at 92.0°C it reads 17.2 A. We can ignore any thermal expansion of the rod. Find the resistivity at 20.0°C and a. b. the temperature coefficient of resistivity at 20.0°C for the material of the rod.
A 1.50-m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 15.0 V across its ends, while an ammeter measures the current through it. We observe that at room temperature (20.0°C) the ammeter reads 18.5 A, while 3. at 92.0°C it reads 17.2 A. We can ignore any thermal expansion of the rod. Find the resistivity at 20.0°C and a. b. the temperature coefficient of resistivity at 20.0°C for the material of the rod.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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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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Please help me answer parts a and b to this question
Transcribed Image Text:Pa
3.
A 1.50-m cylindrical rod of diameter 0.500 cm is connected to a power supply that
maintains a constant potential difference of 15.0 V across its ends, while an ammeter measures the
current through it. We observe that at room temperature (20.0°C) the ammeter reads 18.5 A, while
at 92.0°C it reads 17.2 A. We can ignore any thermal expansion of the rod. Find
the resistivity at 20.0°C and
the temperature coefficient of resistivity at 20.0°C for the material of the rod.
a.
b.
5.
R=100 2, R2=200 2, R3=300 N. What is the total resistance if these resistors are connected in
series? What is the resistance if these resistors are connected in parallel?
→)
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