11. A typical car seat heater produces 10 W of heat using a 0.25 mm diameter steel wire connected to the car's 12 V electrical system. How long is the wire? The resistivity of this particular steel is p = 4.6 × 10¬7 N.m. А. 0.50 m В. 1.0 m С. 1.5 m D. 2.0 m

11. A typical car seat heater produces 10 W of heat using a 0.25 mm diameter steel wire connected to the car's 12 V electrical system. How long is the wire? The resistivity of this particular steel is p = 4.6 × 10¬7 N.m. А. 0.50 m В. 1.0 m С. 1.5 m D. 2.0 m

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 66AP: When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T ...

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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

11. A typical car seat heater produces 10 W of heat using a 0.25 mm diameter steel wire connected to
the car's 12 V electrical system. How long is the wire? The resistivity of this particular steel is
p = 4.6 × 10¬7 N.m.
А. 0.50 m
В. 1.0 m
С. 1.5 m
D. 2.0 m

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