Categories > magnetism > Magnet and It's Properties > A bar magnet of magnetic moment $10^4 J/T$ is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of $4\times 10^{–5} T$ to a direction 60° from the field will be

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Question: A bar magnet of magnetic moment $10^4 J/T$ is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of $4\times 10^{–5} T$ to a direction 60° from the field will be


1) 0.2 J
2) 2.0 J
3) 4.18 J
4) $2 \times 10^2$ J
Solution: Explanation: No Explanation
Magnet and It's Properties

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