The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10 Q-m). The light bulb is plugged into a 120-V outlet and draws a current of 2.46 A. If the radius of the tungsten wire is 0.00404 mm, how long must the wire be? Number i Units

The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10 Q-m). The light bulb is plugged into a 120-V outlet and draws a current of 2.46 A. If the radius of the tungsten wire is 0.00404 mm, how long must the wire be? Number i Units

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 3P: The quantity of charge q (in coulombs) that has passed through a surface of area 2.00 cm2 varies...

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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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The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10-8 Q-m). The light bulb is plugged into a 120-V
outlet and draws a current of 2.46 A. If the radius of the tungsten wire is 0.00404 mm, how long must the wire be?
Number
i
Units

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