As loop of magnetic moment `M` is placed in the orientation of unstable equilbirum position in a uniform magnetic field `B`. The external work done in rotating it through an angle `theta` is

A magnet of magnetic moment M is freely suspended in a uniform magnetic field of strength B. The work done in rotating the magnet through an angle theta is given by ________

If a bar magnet moment M is freely suspended in a uniform magnetic field of strength field of strength B, then the work done in rotating the magent through an angle theta is

If a bar magnet moment M is freely suspended in a uniform magnetic field of strength field of strength B, then the work done in rotating the magent through an angle theta is

A circular current loop of magnetic moment M is in an arbitrary orientation in an external uniform magnetic field vecB . The work done to rotate the loop by 30^(@) about an axis perpendicular to its plane is

A bar magnet is placed in the position of stable equilibrium in a uniform magnetic field of induction B. If it is rotated through an angle 180^@ , then the work done is.......(M = Magnetic Dipole moment of Bar magnet)