$15)$

A rigid circular loop has a radius of $0\mathrm{.}20$ m and is in the $\backslash ($ x$-$y $\backslash )$ plane. A clockwise current I is carried by the loop, as shown. The magnitude of the magnetic moment of the loop is $\backslash (0\mathrm{.}75\backslash$mathrm$\{$~A$\}\backslash$cdot $\backslash$mathrm$\{$~m$\}^\{2\}\backslash ).$ A uniform external magnetic field, $\backslash (\backslash$mathrm$\{$B$\}=0\mathrm{.}20\backslash$mathrm$\{$~T$\}\backslash )$ in the positive x $-$direction, is present.

$4)$ In Figure $27\mathrm{.}8,$ the current in the loop is closest to:

A$)7\mathrm{.}5$ A

B$)3\mathrm{.}0$ A

C$)9\mathrm{.}0$ A

D$)6\mathrm{.}0$ A

E$)4\mathrm{.}5$ A