- #1
exitwound
- 292
- 1
Homework Statement
Homework Equations
J=i/a
The Attempt at a Solution
Studying for a test. This sample exam went pretty well. I am having trouble with 3 out of the 20. I can't figure this one out. I can't seem to find how to get a denominator value.
The answer is B.
I know that current density is equal to the current over the area.
[tex]J=\frac{i}{A}[/tex]
[tex]J_o(r/R)=\frac{i}{\pi (\frac{r}{R}^2)}[/tex]
I know I'm doing something wrong. Anyone help?