The internal inductance of a straight wire of circular cross section with radius r, length l and permeability μ is
1
\(\frac{\mu }{{2\pi }}In\left( {\frac{r}{l}} \right)H/m\)
2
\(\frac{\mu }{{4\pi }}H/m\)
3
\(\frac{\mu }{{8\pi }}H/m\)
4
None of the above
5
Question Not Attempted