The magnitude J(r) of the current density in a certaincylindrical wire is given as a function of radialdistance from the center of the wire's cross sectionas J(r) = Br, where r is in meters, J is in amperes persquare meter, and B = 2.04 × 105 A/m³. This functionapplies out to the wire's radius of 2.00 mm. Howmuch current is contained within the width of a thinring concentric with the wire if the ring has a radialwidth of 12.2 µm and is at a radial distance of 1.42mm?Number iUnitsНА

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The magnitude J(r) of the current density in a certain cylindrical wire is given as a function of radial distance from the center of the wire's cross section as J(r) = Br, where r is in meters, J is in amperes per square meter, and B = 2.04 x 105 A/m³. This function applies out to the wire's radius of 2.00 mm. How much current is contained within the width of a thin ring concentric with the wire if the ring has a radial width of 12.2 μm and is at a radial distance of 1.42 mm? Number IM i Units НА

The magnitude J(r) of the current density in a certain cylindrical wire is given as a function of radial distance from the center of the wire's cross section as J(r) = Br, where r is in meters, J is in amperes per square meter, and B = 2.04 x 105 A/m³. This function applies out to the wire's radius of 2.00 mm. How much current is contained within the width of a thin ring concentric with the wire if the ring has a radial width of 12.2 μm and is at a radial distance of 1.42 mm? Number IM i Units НА

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

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

The magnitude J(r) of the current density in a certain
cylindrical wire is given as a function of radial
distance from the center of the wire's cross section
as J(r) = Br, where r is in meters, J is in amperes per
square meter, and B = 2.04 × 105 A/m³. This function
applies out to the wire's radius of 2.00 mm. How
much current is contained within the width of a thin
ring concentric with the wire if the ring has a radial
width of 12.2 µm and is at a radial distance of 1.42
mm?
Number i
Units
НА

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