Consider an aluminum wire of diameter 0.600 mm and length15.0 m. The resistivity of aluminum at 20.0°C is 2.82 x 1028 Ω ⋅ m. (a) Find the resistance of this wire at 20.0°C. (b) If a 9.00 - Vbattery is connected across the ends of the wire, find the currentin the wire.

Consider an aluminum wire of diameter 0.600 mm and length15.0 m. The resistivity of aluminum at 20.0°C is 2.82 x 1028 Ω ⋅ m. (a) Find the resistance of this wire at 20.0°C. (b) If a 9.00 - Vbattery is connected across the ends of the wire, find the currentin the wire.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 31P: Consider a wire of a circular cross-section with a radius of R = 3.00mm. The magnitude of the...

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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

Consider an aluminum wire of diameter 0.600 mm and length
15.0 m. The resistivity of aluminum at 20.0°C is 2.82 x 10²⁸ Ω ⋅ m.

(a) Find the resistance of this wire at 20.0°C. (b) If a 9.00 - V
battery is connected across the ends of the wire, find the current
in the wire.

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