has a current density of 6.01×106 A/m2. If the cross-sectional area of the wire is 2.91 mm2, what current ? does the wire carry? ?= A With this current, how much time ? is required for 4.15×1020 electrons to pass any point on the wire? ?=

has a current density of 6.01×106 A/m2. If the cross-sectional area of the wire is 2.91 mm2, what current ? does the wire carry? ?= A With this current, how much time ? is required for 4.15×1020 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 29P: The current of an election beam has a measuredcurrent of I=50.00A with a radius of 1.00 mm2. What is...

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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 wire has a current density of 6.01×106 A/m2. If the cross-sectional area of the wire is 2.91 mm2, what current ? does the wire carry?

With this current, how much time ? is required for 4.15×1020 electrons to pass any point on the wire?

Expert Solution

Step 1

Given

Current density J = 6.01 × 10⁶A/m²

Cross sectional area A = 2.91 mm²= 2.91 ×10^-6m²

Number of electron = 4.15 × 10²⁰

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