Answer & explanation
Correct answer: option 3
$\text{In uniform magnetic field force on north pole cancels force on south pole}$
$\Rightarrow F_{net} = 0 \text{ and } \vec{\tau} = \vec{M}\times \vec{B}$
Correct answer: option 3
$\text{In uniform magnetic field force on north pole cancels force on south pole}$
$\Rightarrow F_{net} = 0 \text{ and } \vec{\tau} = \vec{M}\times \vec{B}$