Physics - Magnetism Question with Solution | TestHub

Magnetic dipole moment is a vector quantity. and they are at  angle of$90°$

Thus, they can be added as perpendicular vectors
$\mathrm{M}=\sqrt{{\mathrm{M}}_1^2+{\mathrm{M}}_2^2}$

$N=\sqrt{3^2+4^2}=5$