A bar magnet having a magnetic moment of 2\times10^4JT^{-1} is free to rotate in a horizontal plane. A horizontal magnetic field B=6\times10^{-4}T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60° from the field is (2009)

Class 12 NEET Physics Magnetism and Matter Questions

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A bar magnet having a magnetic moment of 2×104JT−1 is free to rotate in a horizontal plane. A horizontal magnetic field B=6×10−4T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60° from the field is

(2009)

12 J
6 J
2 J
0.6 J

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