A current of 0.78 A flows through a copper wire 0.50 mm in diameter when it is connected to a potential difference of 15 V. Part A How long is the wire? Express your answer using two significant figures. 195| ΑΣΦ L = .1 ? km

A current of 0.78 A flows through a copper wire 0.50 mm in diameter when it is connected to a potential difference of 15 V. Part A How long is the wire? Express your answer using two significant figures. 195| ΑΣΦ L = .1 ? km

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 67PQ

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Concept explainers

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.

Question

HW 3, Q2

not getting the right answer

A current of 0.78 A flows through a copper wire
0.50 mm in diameter when it is connected to a
potential difference of 15 V.
Part A
How long is the wire?
Express your answer using two significant figures.
L =
1
{Π| ΑΣΦ
?
km

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