A certain wire used in electric heaters has a resistance per length of 1.75 Ω/m. What length of the wire is needed to make a heating element for a toaster which takes 8.25 A from a 115-V line? Group of answer choices: a. 8 m b. 9 m c. 10 m d. 11 m

A certain wire used in electric heaters has a resistance per length of 1.75 Ω/m. What length of the wire is needed to make a heating element for a toaster which takes 8.25 A from a 115-V line? Group of answer choices: a. 8 m b. 9 m c. 10 m d. 11 m

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter21: Circuits And Dc Instruments

Section: Chapter Questions

Problem 20PE: A car battery with a 12-V emf and an internal resistance of 0.050 is being charged with a current...

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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.

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A certain wire used in electric heaters has a resistance per length of 1.75 Ω/m. What length of the wire is needed to make a heating element for a toaster which takes 8.25 A from a 115-V line?

Group of answer choices:

a. 8 m

b. 9 m

c. 10 m

d. 11 m

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