# Electromagnetism help (1 Viewer)

#### zacn

##### New Member
Anyone help with this question please.

#### Canteen

##### New Member
$\bg_white \frac{F}{\ell}=k\frac{I^2}{d} \implies I=\sqrt{\frac{Fd}{\ell k}}\ \ \left(\textrm{where } k\textrm{ is } \frac{\mu_0}{2\pi}\right)$
So we want something that looks like $\bg_white y=\sqrt{x}$ making the answer D