Magnetic dipole moment is a

$A$ magnetic needle is kept in a non-uniform magnetic field. It experiences

$A$ magnetized wire of magnetic moment $M$ and length $L$ is bent into an arc of a circle subtending an angle of $60^{\circ}$ at the center. The new magnetic moment is:

Three identical bar magnets each of magnetic moment $M$ are placed in the form of an equilateral triangle as shown. The net magnetic moment of the system is

The magnetic lines of force inside a bar magnet

The incorrect statement regarding the lines of force of the magnetic field $B$ is: