College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 20, Problem 31PE
Of what material is a resistor made if its resistance is 40.0% greater at 100°C than at 20.0°C ?
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Two identical resistors of R0=32 omega are connected head to tail.
Part (a) Express the resistance R0 of one of the resistors in terms of the resistivity, length L, and the cross section area A.
Part (b) calculate the total resistance R of the two resistors in ohms.
Two identical resistors of R0 = 98 Ω are connected head-to-tail.
Express the resistance R0 of one of the resistors in terms of the resistivity ρ, length L, and the cross section area A.
Calculate the total resistance R of the two resistors in ohms.
A copper wire has a resistance of 15 Ω at some temperature. An aluminum wire has 3 times the length and 5 times the radius of the copper wire. The resistivity of copper is 0.7 times that of aluminum. What is the resistance, in Ω, of the aluminum wire at the same temperature?
Round your answer to 0 decimal places.
Chapter 20 Solutions
College Physics
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