4-W5XA certain cylindrical wire carries current. We draw a circle of radius r around its central axis in Figure (a) to determine the current iwithin the circle. Figure (b) shows current i as a function of r2. The vertical scale is set by is = 4.7 mA, and the horizontal scale is set byr² = 4.3 mm². (a) Is the current density uniform? (b) If so, what is its magnitude?(a)(b) Number ieTextbook and MediaHintSave for Later3EQ SearchF4$RJeC%5UnitsF60(a)B² (mm²)(b)&76TJOOFBH*8Attempts: unlimited Submit Answer8(9GOL HULMONUOKPF12V

The circular area depends, of course, on , so the horizontal axis of the graph in Figure(b) is…

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A certain cylindrical wire carries current. We draw a circle of radius r around its central axis in Figure (a) to determine the current i within the circle. Figure (b) shows current i as a function of r². The vertical scale is set by is = 5.3 mA, and the horizontal scale is set by r² = 4.7 mm². (a) is the current density uniform? (b) If so, what is its magnitude? (a) (b) Number i Units i (mA) (()) (a) -² (mm²) (b)
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