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Fundamentals of Physics, (Chapters 21- 44) (Volume 2)

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Quiz 4 , July 15 th 2008 Name: The magnitude J ( r ) of the current density in a cylindrical wire is given as a func- tion of radial distance from the center of the wire’s cross section as
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Unformatted text preview: J ( r ) = B r , where r is in meters, J in Amperes per square meters and B = 2 · 10 5 A/m. What is the current through the wire if its radius is 2mm?...
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