# Homework Help: Nonuniform Current Density

1. Apr 13, 2008

### splac6996

A long, straight conducting wire of radius R has a nonuniform current density J=J$$_{}0$$*r/R , where J$$_{}0$$ is a constant. The wire carries total current I .Find an expression for J$$_{}0$$ in terms of I and R .

2. Apr 15, 2008

### pam

You have to integrate: $$I=2\pi\int_0^R Jrdr$$.

Last edited: Apr 15, 2008