College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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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, Jis in amperes per square meter, and B = 2.20 × 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 11.7 pm and is at a radial distance of 1.28 mm?
Number
i
Units
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Transcribed Image Text: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, Jis in amperes per square meter, and B = 2.20 × 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 11.7 pm and is at a radial distance of 1.28 mm? Number i Units
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