A wire of length L and cross-sectional area A has a resistivity p. Which of the following formulas can be used to calculate the resistance of the wire? L A Select one: A a. R = pL pL b. R = A c. R = pA С. L d. R=2 A e. R = PA е.

A wire of length L and cross-sectional area A has a resistivity p. Which of the following formulas can be used to calculate the resistance of the wire? L A Select one: A a. R = pL pL b. R = A c. R = pA С. L d. R=2 A e. R = PA е.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 73AP: When 100.0 V is applied across a 5-gauge (diameter 4.621 mm) wire that is 10 m long, the magnitude...

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

A wire of length L and cross-sectional area A has a resistivity
p. Which of the following formulas can be used to calculate
the resistance of the wire?
L
A
Select one:
A
a. R =
pL
b. R = PL
A
С.
d. R =L
A
e. R = -
PA
е.

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