A wire has a current density of 7.09 x 10° A/m². If the cross-sectional area of the wire is 2.11 mm², what current I does the wire carry? A With this current, how much time t is required for 4.05 × 100 electrons to pass any point on the wire?

A wire has a current density of 7.09 x 10° A/m². If the cross-sectional area of the wire is 2.11 mm², what current I does the wire carry? A With this current, how much time t is required for 4.05 × 100 electrons to pass any point on the wire?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 30P: A high-energy proton accelerator produces a proton beam with a radius of r - 0,90 mm. The beam...

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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 wire has a current density of 7.09 x 10° A/m?. If the cross-sectional area of the wire is 2.11 mm², what current I does
the wire carry?
A.
With this current, how much time t is required for 4.05 x 100 electrons to pass any point on the wire?

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