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- Homework Statement
- The current density across a cylindrical conductor of radius R varies according to the

equation J=α(r−r2/R), where r is the distance from the axis. Thus the current density is a

maximum J0 at the axis r=0 and decreases linearly to zero at the surface r=R in which α is a constant.

What is the current through the outer portion of the wire between radial distance R/3

and R. Take R=2mm and α=2*105 A/m2

- Relevant Equations
- J=α(r−r2/R)

I have attached my solution to this problem but I think I got the wrong answer.