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- Homework Statement
- In a uniform solid cylinder of radius r conductivity increases linearly with the distance as we move from the the axis to the surface of the cylinder from sigma1 to sigma2.Current i enters the cylinder from one end and leaves from the other end .Find the current density as a function of distance from the axis of cylinder at any cross section.

- Relevant Equations
- J=sigma E

E=V/L

V=IR

Where R is resistance

I first took out the variation of conductivity along the radius of cylinder.Also we know that J=sigmaE.Therefore i have to find variation of E also.But how will i find that as potential is also not given.Help.