A heating element is made by maintaining a potential difference of 89.0 V across the length of a Nichrome wire that has a 4.96 x 10-6 m² cross section. Nichrome has a resistivity of 5.00 x 10-7 2-m. (a) If the element dissipates 2880 W, what is its length? (b) If 102 V is used to obtain the same dissipation rate, what should the length be?

A heating element is made by maintaining a potential difference of 89.0 V across the length of a Nichrome wire that has a 4.96 x 10-6 m² cross section. Nichrome has a resistivity of 5.00 x 10-7 2-m. (a) If the element dissipates 2880 W, what is its length? (b) If 102 V is used to obtain the same dissipation rate, what should the length be?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

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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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

A heating element is made by maintaining a potential difference of 89.0 V across the length of a Nichrome wire that has a 4.96 x 10-6 m2 cross section. Nichrome has a resistivity of 5.00 x 10-7 2:m. (a) If the
element dissipates 2880 W, what is its length? (b) If 102 V is used to obtain the same dissipation rate, what should the length be?
(a) Number
Units
(b) Number
Units

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