A toroid of $n$ turns, mean radius $R$ and cross-sectional radius $a$ carries current $I.$It is placed on a horizontal table taken as $x-y$plane. Its magnetic moment $\overrightarrow{M}$

is non-zero and points in the $z$$-$direction by symmetry

points along the axis of the $toroid (\overrightarrow{M}=M\hat{\varphi })$

is zero, otherwise there would be a field falling as $\frac{1}{r^3}$ at large distances outside the toroid

is pointing radially outwards.