The self inductance of a solenoid of length L, area of cross-section A and having N turns is

• A

  $\frac{{\mathrm{\mu }}_0{\mathrm{N}}^2\mathrm{A}}{\mathrm{L}}$

• B

  $\frac{{\mathrm{\mu }}_0\mathrm{NA}}{\mathrm{L}}$

• C

  ${\mathrm{\mu }}_0{\mathrm{N}}^2\mathrm{LA}$

• D

  ${\mathrm{\mu }}_0\mathrm{NAL}$