Answer
The current density is uniform.
Work Step by Step
The current density is: $~~J = \frac{current}{area} = \frac{i}{\pi~r^2}$
Since the graph of $i$ versus $r^2$ is a straight line, then the current density is uniform.
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 26 - Current and Resistance - Problems - Page 766: 6a
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