A bar magnet of magnetic moment 1.5 J T−1 lies aligned with the direction of a uniform magnetic field of 0.22 T. An external source is applied to turn the magnet so as to align its magnetic moment opposite to the field direction. The work done by the external source is
1
0.33 J
2
0.66 J
3
3.3 J
4
More than one of the above
5
None of the above